diff --git a/Cargo.lock b/Cargo.lock
index a12ec25c9..0586e8f62 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1145,9 +1145,9 @@ checksum = "830d08ce1d1d941e6b30645f1a0eb5643013d835ce3779a5fc208261dbe10f55"
 
 [[package]]
 name = "libc"
-version = "0.2.135"
+version = "0.2.137"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "68783febc7782c6c5cb401fbda4de5a9898be1762314da0bb2c10ced61f18b0c"
+checksum = "fc7fcc620a3bff7cdd7a365be3376c97191aeaccc2a603e600951e452615bf89"
 
 [[package]]
 name = "libloading"
@@ -2076,21 +2076,32 @@ dependencies = [
 
 [[package]]
 name = "time"
-version = "0.3.15"
+version = "0.3.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d634a985c4d4238ec39cacaed2e7ae552fbd3c476b552c1deac3021b7d7eaf0c"
+checksum = "0fab5c8b9980850e06d92ddbe3ab839c062c801f3927c0fb8abd6fc8e918fbca"
 dependencies = [
  "itoa",
  "libc",
  "num_threads",
+ "serde",
+ "time-core",
  "time-macros",
 ]
 
 [[package]]
-name = "time-macros"
-version = "0.2.4"
+name = "time-core"
+version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "42657b1a6f4d817cda8e7a0ace261fe0cc946cf3a80314390b22cc61ae080792"
+checksum = "2e153e1f1acaef8acc537e68b44906d2db6436e2b35ac2c6b42640fff91f00fd"
+
+[[package]]
+name = "time-macros"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "65bb801831d812c562ae7d2bfb531f26e66e4e1f6b17307ba4149c5064710e5b"
+dependencies = [
+ "time-core",
+]
 
 [[package]]
 name = "typenum"
diff --git a/out b/out
deleted file mode 100644
index e69de29bb..000000000
diff --git a/src/uu/chcon/src/chcon.rs b/src/uu/chcon/src/chcon.rs
index 1742ca1a2..2abf8d40a 100644
--- a/src/uu/chcon/src/chcon.rs
+++ b/src/uu/chcon/src/chcon.rs
@@ -100,7 +100,7 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
         }
 
         CommandLineMode::ContextBased { context } => {
-            let c_context = match os_str_to_c_string(&context) {
+            let c_context = match os_str_to_c_string(context) {
                 Ok(context) => context,
 
                 Err(_r) => {
@@ -198,7 +198,7 @@ pub fn uu_app() -> Command {
                 .long(options::REFERENCE)
                 .value_name("RFILE")
                 .value_hint(clap::ValueHint::FilePath)
-                .conflicts_with_all(&[options::USER, options::ROLE, options::TYPE, options::RANGE])
+                .conflicts_with_all([options::USER, options::ROLE, options::TYPE, options::RANGE])
                 .help(
                     "Use security context of RFILE, rather than specifying \
                      a CONTEXT value.",
@@ -249,7 +249,7 @@ pub fn uu_app() -> Command {
             Arg::new(options::sym_links::FOLLOW_ARG_DIR_SYM_LINK)
                 .short('H')
                 .requires(options::RECURSIVE)
-                .overrides_with_all(&[
+                .overrides_with_all([
                     options::sym_links::FOLLOW_DIR_SYM_LINKS,
                     options::sym_links::NO_FOLLOW_SYM_LINKS,
                 ])
@@ -263,7 +263,7 @@ pub fn uu_app() -> Command {
             Arg::new(options::sym_links::FOLLOW_DIR_SYM_LINKS)
                 .short('L')
                 .requires(options::RECURSIVE)
-                .overrides_with_all(&[
+                .overrides_with_all([
                     options::sym_links::FOLLOW_ARG_DIR_SYM_LINK,
                     options::sym_links::NO_FOLLOW_SYM_LINKS,
                 ])
@@ -277,7 +277,7 @@ pub fn uu_app() -> Command {
             Arg::new(options::sym_links::NO_FOLLOW_SYM_LINKS)
                 .short('P')
                 .requires(options::RECURSIVE)
-                .overrides_with_all(&[
+                .overrides_with_all([
                     options::sym_links::FOLLOW_ARG_DIR_SYM_LINK,
                     options::sym_links::FOLLOW_DIR_SYM_LINKS,
                 ])
diff --git a/src/uu/chgrp/src/chgrp.rs b/src/uu/chgrp/src/chgrp.rs
index a97f6f1ef..3b8d0bab0 100644
--- a/src/uu/chgrp/src/chgrp.rs
+++ b/src/uu/chgrp/src/chgrp.rs
@@ -146,7 +146,7 @@ pub fn uu_app() -> Command {
             Arg::new(options::traverse::NO_TRAVERSE)
                 .short(options::traverse::NO_TRAVERSE.chars().next().unwrap())
                 .help("do not traverse any symbolic links (default)")
-                .overrides_with_all(&[options::traverse::TRAVERSE, options::traverse::EVERY])
+                .overrides_with_all([options::traverse::TRAVERSE, options::traverse::EVERY])
                 .action(ArgAction::SetTrue),
         )
         .arg(
diff --git a/src/uu/chmod/Cargo.toml b/src/uu/chmod/Cargo.toml
index c794ad821..adb72a256 100644
--- a/src/uu/chmod/Cargo.toml
+++ b/src/uu/chmod/Cargo.toml
@@ -16,7 +16,7 @@ path = "src/chmod.rs"
 
 [dependencies]
 clap = { version = "4.0", features = ["wrap_help", "cargo"] }
-libc = "0.2.135"
+libc = "0.2.137"
 uucore = { version=">=0.0.16", package="uucore", path="../../uucore", features=["fs", "mode"] }
 
 [[bin]]
diff --git a/src/uu/chown/src/chown.rs b/src/uu/chown/src/chown.rs
index d99516d92..b2a0dcd85 100644
--- a/src/uu/chown/src/chown.rs
+++ b/src/uu/chown/src/chown.rs
@@ -156,21 +156,21 @@ pub fn uu_app() -> Command {
             Arg::new(options::traverse::TRAVERSE)
                 .short(options::traverse::TRAVERSE.chars().next().unwrap())
                 .help("if a command line argument is a symbolic link to a directory, traverse it")
-                .overrides_with_all(&[options::traverse::EVERY, options::traverse::NO_TRAVERSE])
+                .overrides_with_all([options::traverse::EVERY, options::traverse::NO_TRAVERSE])
                 .action(ArgAction::SetTrue),
         )
         .arg(
             Arg::new(options::traverse::EVERY)
                 .short(options::traverse::EVERY.chars().next().unwrap())
                 .help("traverse every symbolic link to a directory encountered")
-                .overrides_with_all(&[options::traverse::TRAVERSE, options::traverse::NO_TRAVERSE])
+                .overrides_with_all([options::traverse::TRAVERSE, options::traverse::NO_TRAVERSE])
                 .action(ArgAction::SetTrue),
         )
         .arg(
             Arg::new(options::traverse::NO_TRAVERSE)
                 .short(options::traverse::NO_TRAVERSE.chars().next().unwrap())
                 .help("do not traverse any symbolic links (default)")
-                .overrides_with_all(&[options::traverse::TRAVERSE, options::traverse::EVERY])
+                .overrides_with_all([options::traverse::TRAVERSE, options::traverse::EVERY])
                 .action(ArgAction::SetTrue),
         )
         .arg(
@@ -246,6 +246,19 @@ fn parse_spec(spec: &str, sep: char) -> UResult<(Option<u32>, Option<u32>)> {
     } else {
         None
     };
+
+    if user.chars().next().map(char::is_numeric).unwrap_or(false)
+        && group.is_empty()
+        && spec != user
+    {
+        // if the arg starts with an id numeric value, the group isn't set but the separator is provided,
+        // we should fail with an error
+        return Err(USimpleError::new(
+            1,
+            format!("invalid spec: {}", spec.quote()),
+        ));
+    }
+
     Ok((uid, gid))
 }
 
diff --git a/src/uu/cp/Cargo.toml b/src/uu/cp/Cargo.toml
index 15ce7c8f5..b54e68464 100644
--- a/src/uu/cp/Cargo.toml
+++ b/src/uu/cp/Cargo.toml
@@ -21,7 +21,7 @@ path = "src/cp.rs"
 [dependencies]
 clap = { version = "4.0", features = ["wrap_help", "cargo"] }
 filetime = "0.2"
-libc = "0.2.135"
+libc = "0.2.137"
 quick-error = "2.0.1"
 selinux = { version="0.3", optional=true }
 uucore = { version=">=0.0.16", package="uucore", path="../../uucore", features=["entries", "fs", "perms", "mode"] }
diff --git a/src/uu/cp/src/copydir.rs b/src/uu/cp/src/copydir.rs
index e0d6e96db..3527e4827 100644
--- a/src/uu/cp/src/copydir.rs
+++ b/src/uu/cp/src/copydir.rs
@@ -66,7 +66,7 @@ fn get_local_to_root_parent(
                 adjust_canonicalization(path),
                 adjust_canonicalization(parent),
             );
-            let path = path.strip_prefix(&parent)?;
+            let path = path.strip_prefix(parent)?;
             Ok(path.to_path_buf())
         }
         None => Ok(path.to_path_buf()),
@@ -303,6 +303,27 @@ pub(crate) fn copy_directory(
         .into());
     }
 
+    // If in `--parents` mode, create all the necessary ancestor directories.
+    //
+    // For example, if the command is `cp --parents a/b/c d`, that
+    // means we need to copy the two ancestor directories first:
+    //
+    // a -> d/a
+    // a/b -> d/a/b
+    //
+    let tmp = if options.parents {
+        if let Some(parent) = root.parent() {
+            let new_target = target.join(parent);
+            std::fs::create_dir_all(&new_target)?;
+            new_target
+        } else {
+            target.to_path_buf()
+        }
+    } else {
+        target.to_path_buf()
+    };
+    let target = tmp.as_path();
+
     let mut hard_links: Vec<(String, u64)> = vec![];
     let preserve_hard_links = options.preserve_hard_links();
 
diff --git a/src/uu/cp/src/cp.rs b/src/uu/cp/src/cp.rs
index 299eca9cf..f0e217b17 100644
--- a/src/uu/cp/src/cp.rs
+++ b/src/uu/cp/src/cp.rs
@@ -427,7 +427,7 @@ pub fn uu_app() -> Command {
                 ))
                 .num_args(0..)
                 .value_name("ATTR_LIST")
-                .overrides_with_all(&[
+                .overrides_with_all([
                     options::ARCHIVE,
                     options::PRESERVE_DEFAULT_ATTRIBUTES,
                     options::NO_PRESERVE,
@@ -443,7 +443,7 @@ pub fn uu_app() -> Command {
             Arg::new(options::PRESERVE_DEFAULT_ATTRIBUTES)
                 .short('p')
                 .long(options::PRESERVE_DEFAULT_ATTRIBUTES)
-                .overrides_with_all(&[options::PRESERVE, options::NO_PRESERVE, options::ARCHIVE])
+                .overrides_with_all([options::PRESERVE, options::NO_PRESERVE, options::ARCHIVE])
                 .help("same as --preserve=mode,ownership(unix only),timestamps")
                 .action(ArgAction::SetTrue),
         )
@@ -451,7 +451,7 @@ pub fn uu_app() -> Command {
             Arg::new(options::NO_PRESERVE)
                 .long(options::NO_PRESERVE)
                 .value_name("ATTR_LIST")
-                .overrides_with_all(&[
+                .overrides_with_all([
                     options::PRESERVE_DEFAULT_ATTRIBUTES,
                     options::PRESERVE,
                     options::ARCHIVE,
@@ -492,7 +492,7 @@ pub fn uu_app() -> Command {
             Arg::new(options::ARCHIVE)
                 .short('a')
                 .long(options::ARCHIVE)
-                .overrides_with_all(&[
+                .overrides_with_all([
                     options::PRESERVE_DEFAULT_ATTRIBUTES,
                     options::PRESERVE,
                     options::NO_PRESERVE,
@@ -1146,7 +1146,16 @@ fn copy_attribute(source: &Path, dest: &Path, attribute: &Attribute) -> CopyResu
             }
             #[cfg(not(unix))]
             {
-                return Err("XAttrs are only supported on unix.".to_string().into());
+                // The documentation for GNU cp states:
+                //
+                // > Try to preserve SELinux security context and
+                // > extended attributes (xattr), but ignore any failure
+                // > to do that and print no corresponding diagnostic.
+                //
+                // so we simply do nothing here.
+                //
+                // TODO Silently ignore failures in the `#[cfg(unix)]`
+                // block instead of terminating immediately on errors.
             }
         }
     };
@@ -1255,6 +1264,12 @@ fn copy_file(
     symlinked_files: &mut HashSet<FileInformation>,
     source_in_command_line: bool,
 ) -> CopyResult<()> {
+    if options.update && options.overwrite == OverwriteMode::Interactive(ClobberMode::Standard) {
+        // `cp -i --update old new` when `new` exists doesn't copy anything
+        // and exit with 0
+        return Ok(());
+    }
+
     if file_or_link_exists(dest) {
         handle_existing_dest(source, dest, options, source_in_command_line)?;
     }
diff --git a/src/uu/dd/src/parseargs/unit_tests.rs b/src/uu/dd/src/parseargs/unit_tests.rs
index 18eeb33a2..7084f8114 100644
--- a/src/uu/dd/src/parseargs/unit_tests.rs
+++ b/src/uu/dd/src/parseargs/unit_tests.rs
@@ -86,7 +86,7 @@ fn unimplemented_flags_should_error() {
 fn test_status_level_absent() {
     let args = &["if=foo.file", "of=bar.file"];
 
-    assert_eq!(Parser::new().parse(args).unwrap().status, None)
+    assert_eq!(Parser::new().parse(args).unwrap().status, None);
 }
 
 #[test]
@@ -96,7 +96,7 @@ fn test_status_level_none() {
     assert_eq!(
         Parser::new().parse(args).unwrap().status,
         Some(StatusLevel::None)
-    )
+    );
 }
 
 #[test]
diff --git a/src/uu/df/src/df.rs b/src/uu/df/src/df.rs
index 8d26bc6f8..8cefd642f 100644
--- a/src/uu/df/src/df.rs
+++ b/src/uu/df/src/df.rs
@@ -509,7 +509,7 @@ pub fn uu_app() -> Command {
                 .short('B')
                 .long("block-size")
                 .value_name("SIZE")
-                .overrides_with_all(&[OPT_KILO, OPT_BLOCKSIZE])
+                .overrides_with_all([OPT_KILO, OPT_BLOCKSIZE])
                 .help(
                     "scale sizes by SIZE before printing them; e.g.\
                     '-BM' prints sizes in units of 1,048,576 bytes",
@@ -526,7 +526,7 @@ pub fn uu_app() -> Command {
             Arg::new(OPT_HUMAN_READABLE_BINARY)
                 .short('h')
                 .long("human-readable")
-                .overrides_with_all(&[OPT_HUMAN_READABLE_DECIMAL, OPT_HUMAN_READABLE_BINARY])
+                .overrides_with_all([OPT_HUMAN_READABLE_DECIMAL, OPT_HUMAN_READABLE_BINARY])
                 .help("print sizes in human readable format (e.g., 1K 234M 2G)")
                 .action(ArgAction::SetTrue),
         )
@@ -534,7 +534,7 @@ pub fn uu_app() -> Command {
             Arg::new(OPT_HUMAN_READABLE_DECIMAL)
                 .short('H')
                 .long("si")
-                .overrides_with_all(&[OPT_HUMAN_READABLE_BINARY, OPT_HUMAN_READABLE_DECIMAL])
+                .overrides_with_all([OPT_HUMAN_READABLE_BINARY, OPT_HUMAN_READABLE_DECIMAL])
                 .help("likewise, but use powers of 1000 not 1024")
                 .action(ArgAction::SetTrue),
         )
@@ -550,7 +550,7 @@ pub fn uu_app() -> Command {
             Arg::new(OPT_KILO)
                 .short('k')
                 .help("like --block-size=1K")
-                .overrides_with_all(&[OPT_BLOCKSIZE, OPT_KILO])
+                .overrides_with_all([OPT_BLOCKSIZE, OPT_KILO])
                 .action(ArgAction::SetTrue),
         )
         .arg(
@@ -564,7 +564,7 @@ pub fn uu_app() -> Command {
         .arg(
             Arg::new(OPT_NO_SYNC)
                 .long("no-sync")
-                .overrides_with_all(&[OPT_SYNC, OPT_NO_SYNC])
+                .overrides_with_all([OPT_SYNC, OPT_NO_SYNC])
                 .help("do not invoke sync before getting usage info (default)")
                 .action(ArgAction::SetTrue),
         )
@@ -577,9 +577,9 @@ pub fn uu_app() -> Command {
                 .require_equals(true)
                 .use_value_delimiter(true)
                 .value_parser(OUTPUT_FIELD_LIST)
-                .default_missing_values(&OUTPUT_FIELD_LIST)
-                .default_values(&["source", "size", "used", "avail", "pcent", "target"])
-                .conflicts_with_all(&[OPT_INODES, OPT_PORTABILITY, OPT_PRINT_TYPE])
+                .default_missing_values(OUTPUT_FIELD_LIST)
+                .default_values(["source", "size", "used", "avail", "pcent", "target"])
+                .conflicts_with_all([OPT_INODES, OPT_PORTABILITY, OPT_PRINT_TYPE])
                 .help(
                     "use the output format defined by FIELD_LIST, \
                      or print all fields if FIELD_LIST is omitted.",
@@ -596,7 +596,7 @@ pub fn uu_app() -> Command {
         .arg(
             Arg::new(OPT_SYNC)
                 .long("sync")
-                .overrides_with_all(&[OPT_NO_SYNC, OPT_SYNC])
+                .overrides_with_all([OPT_NO_SYNC, OPT_SYNC])
                 .help("invoke sync before getting usage info (non-windows only)")
                 .action(ArgAction::SetTrue),
         )
diff --git a/src/uu/echo/src/echo.rs b/src/uu/echo/src/echo.rs
index ebf0d46e7..65819a800 100644
--- a/src/uu/echo/src/echo.rs
+++ b/src/uu/echo/src/echo.rs
@@ -64,6 +64,9 @@ fn print_escaped(input: &str, mut output: impl Write) -> io::Result<bool> {
 
     let mut buffer = ['\\'; 2];
 
+    // TODO `cargo +nightly clippy` complains that `.peek()` is never
+    // called on `iter`. However, `peek()` is called inside the
+    // `parse_code()` function that borrows `iter`.
     let mut iter = input.chars().peekable();
     while let Some(mut c) = iter.next() {
         let mut start = 1;
diff --git a/src/uu/hashsum/src/hashsum.rs b/src/uu/hashsum/src/hashsum.rs
index 2d01c9d64..87c79fe1f 100644
--- a/src/uu/hashsum/src/hashsum.rs
+++ b/src/uu/hashsum/src/hashsum.rs
@@ -278,8 +278,8 @@ pub fn uumain(mut args: impl uucore::Args) -> UResult<()> {
     let tag = matches.get_flag("tag");
     let nonames = *matches
         .try_get_one("no-names")
-        .unwrap_or(Some(&false))
-        .unwrap();
+        .unwrap_or(None)
+        .unwrap_or(&false);
     let status = matches.get_flag("status");
     let quiet = matches.get_flag("quiet") || status;
     let strict = matches.get_flag("strict");
diff --git a/src/uu/head/src/head.rs b/src/uu/head/src/head.rs
index a01fe94f7..32a4ad376 100644
--- a/src/uu/head/src/head.rs
+++ b/src/uu/head/src/head.rs
@@ -59,7 +59,7 @@ pub fn uu_app() -> Command {
                      NUM bytes of each file\
                      ",
                 )
-                .overrides_with_all(&[options::BYTES_NAME, options::LINES_NAME])
+                .overrides_with_all([options::BYTES_NAME, options::LINES_NAME])
                 .allow_hyphen_values(true),
         )
         .arg(
@@ -74,7 +74,7 @@ pub fn uu_app() -> Command {
                      NUM lines of each file\
                      ",
                 )
-                .overrides_with_all(&[options::LINES_NAME, options::BYTES_NAME])
+                .overrides_with_all([options::LINES_NAME, options::BYTES_NAME])
                 .allow_hyphen_values(true),
         )
         .arg(
@@ -83,7 +83,7 @@ pub fn uu_app() -> Command {
                 .long("quiet")
                 .visible_alias("silent")
                 .help("never print headers giving file names")
-                .overrides_with_all(&[options::VERBOSE_NAME, options::QUIET_NAME])
+                .overrides_with_all([options::VERBOSE_NAME, options::QUIET_NAME])
                 .action(ArgAction::SetTrue),
         )
         .arg(
@@ -91,7 +91,7 @@ pub fn uu_app() -> Command {
                 .short('v')
                 .long("verbose")
                 .help("always print headers giving file names")
-                .overrides_with_all(&[options::QUIET_NAME, options::VERBOSE_NAME])
+                .overrides_with_all([options::QUIET_NAME, options::VERBOSE_NAME])
                 .action(ArgAction::SetTrue),
         )
         .arg(
diff --git a/src/uu/hostid/Cargo.toml b/src/uu/hostid/Cargo.toml
index 0938a1bec..81dfb68d1 100644
--- a/src/uu/hostid/Cargo.toml
+++ b/src/uu/hostid/Cargo.toml
@@ -16,7 +16,7 @@ path = "src/hostid.rs"
 
 [dependencies]
 clap = { version = "4.0", features = ["wrap_help", "cargo"] }
-libc = "0.2.135"
+libc = "0.2.137"
 uucore = { version=">=0.0.16", package="uucore", path="../../uucore" }
 
 [[bin]]
diff --git a/src/uu/hostname/src/hostname.rs b/src/uu/hostname/src/hostname.rs
index b9699d99a..92950f137 100644
--- a/src/uu/hostname/src/hostname.rs
+++ b/src/uu/hostname/src/hostname.rs
@@ -81,7 +81,7 @@ pub fn uu_app() -> Command {
             Arg::new(OPT_DOMAIN)
                 .short('d')
                 .long("domain")
-                .overrides_with_all(&[OPT_DOMAIN, OPT_IP_ADDRESS, OPT_FQDN, OPT_SHORT])
+                .overrides_with_all([OPT_DOMAIN, OPT_IP_ADDRESS, OPT_FQDN, OPT_SHORT])
                 .help("Display the name of the DNS domain if possible")
                 .action(ArgAction::SetTrue),
         )
@@ -89,7 +89,7 @@ pub fn uu_app() -> Command {
             Arg::new(OPT_IP_ADDRESS)
                 .short('i')
                 .long("ip-address")
-                .overrides_with_all(&[OPT_DOMAIN, OPT_IP_ADDRESS, OPT_FQDN, OPT_SHORT])
+                .overrides_with_all([OPT_DOMAIN, OPT_IP_ADDRESS, OPT_FQDN, OPT_SHORT])
                 .help("Display the network address(es) of the host")
                 .action(ArgAction::SetTrue),
         )
@@ -97,7 +97,7 @@ pub fn uu_app() -> Command {
             Arg::new(OPT_FQDN)
                 .short('f')
                 .long("fqdn")
-                .overrides_with_all(&[OPT_DOMAIN, OPT_IP_ADDRESS, OPT_FQDN, OPT_SHORT])
+                .overrides_with_all([OPT_DOMAIN, OPT_IP_ADDRESS, OPT_FQDN, OPT_SHORT])
                 .help("Display the FQDN (Fully Qualified Domain Name) (default)")
                 .action(ArgAction::SetTrue),
         )
@@ -105,7 +105,7 @@ pub fn uu_app() -> Command {
             Arg::new(OPT_SHORT)
                 .short('s')
                 .long("short")
-                .overrides_with_all(&[OPT_DOMAIN, OPT_IP_ADDRESS, OPT_FQDN, OPT_SHORT])
+                .overrides_with_all([OPT_DOMAIN, OPT_IP_ADDRESS, OPT_FQDN, OPT_SHORT])
                 .help("Display the short hostname (the portion before the first dot) if possible")
                 .action(ArgAction::SetTrue),
         )
diff --git a/src/uu/id/src/id.rs b/src/uu/id/src/id.rs
index 720339545..61a975978 100644
--- a/src/uu/id/src/id.rs
+++ b/src/uu/id/src/id.rs
@@ -348,7 +348,7 @@ pub fn uu_app() -> Command {
         .arg(
             Arg::new(options::OPT_AUDIT)
                 .short('A')
-                .conflicts_with_all(&[
+                .conflicts_with_all([
                     options::OPT_GROUP,
                     options::OPT_EFFECTIVE_USER,
                     options::OPT_HUMAN_READABLE,
@@ -382,7 +382,7 @@ pub fn uu_app() -> Command {
             Arg::new(options::OPT_GROUPS)
                 .short('G')
                 .long(options::OPT_GROUPS)
-                .conflicts_with_all(&[
+                .conflicts_with_all([
                     options::OPT_GROUP,
                     options::OPT_EFFECTIVE_USER,
                     options::OPT_CONTEXT,
@@ -443,7 +443,7 @@ pub fn uu_app() -> Command {
             Arg::new(options::OPT_CONTEXT)
                 .short('Z')
                 .long(options::OPT_CONTEXT)
-                .conflicts_with_all(&[options::OPT_GROUP, options::OPT_EFFECTIVE_USER])
+                .conflicts_with_all([options::OPT_GROUP, options::OPT_EFFECTIVE_USER])
                 .help(CONTEXT_HELP_TEXT)
                 .action(ArgAction::SetTrue),
         )
diff --git a/src/uu/logname/Cargo.toml b/src/uu/logname/Cargo.toml
index e688346ce..72c264fe6 100644
--- a/src/uu/logname/Cargo.toml
+++ b/src/uu/logname/Cargo.toml
@@ -15,7 +15,7 @@ edition = "2021"
 path = "src/logname.rs"
 
 [dependencies]
-libc = "0.2.135"
+libc = "0.2.137"
 clap = { version = "4.0", features = ["wrap_help", "cargo"] }
 uucore = { version=">=0.0.16", package="uucore", path="../../uucore" }
 
diff --git a/src/uu/ls/src/ls.rs b/src/uu/ls/src/ls.rs
index a30cda01d..054ff9127 100644
--- a/src/uu/ls/src/ls.rs
+++ b/src/uu/ls/src/ls.rs
@@ -981,7 +981,7 @@ pub fn uu_app() -> Command {
                 ])
                 .hide_possible_values(true)
                 .require_equals(true)
-                .overrides_with_all(&[
+                .overrides_with_all([
                     options::FORMAT,
                     options::format::COLUMNS,
                     options::format::LONG,
@@ -993,7 +993,7 @@ pub fn uu_app() -> Command {
             Arg::new(options::format::COLUMNS)
                 .short('C')
                 .help("Display the files in columns.")
-                .overrides_with_all(&[
+                .overrides_with_all([
                     options::FORMAT,
                     options::format::COLUMNS,
                     options::format::LONG,
@@ -1007,7 +1007,7 @@ pub fn uu_app() -> Command {
                 .short('l')
                 .long(options::format::LONG)
                 .help("Display detailed information.")
-                .overrides_with_all(&[
+                .overrides_with_all([
                     options::FORMAT,
                     options::format::COLUMNS,
                     options::format::LONG,
@@ -1020,7 +1020,7 @@ pub fn uu_app() -> Command {
             Arg::new(options::format::ACROSS)
                 .short('x')
                 .help("List entries in rows instead of in columns.")
-                .overrides_with_all(&[
+                .overrides_with_all([
                     options::FORMAT,
                     options::format::COLUMNS,
                     options::format::LONG,
@@ -1042,7 +1042,7 @@ pub fn uu_app() -> Command {
             Arg::new(options::format::COMMAS)
                 .short('m')
                 .help("List entries separated by commas.")
-                .overrides_with_all(&[
+                .overrides_with_all([
                     options::FORMAT,
                     options::format::COLUMNS,
                     options::format::LONG,
@@ -1114,7 +1114,7 @@ pub fn uu_app() -> Command {
                     "c",
                     "escape",
                 ])
-                .overrides_with_all(&[
+                .overrides_with_all([
                     options::QUOTING_STYLE,
                     options::quoting::LITERAL,
                     options::quoting::ESCAPE,
@@ -1126,7 +1126,7 @@ pub fn uu_app() -> Command {
                 .short('N')
                 .long(options::quoting::LITERAL)
                 .help("Use literal quoting style. Equivalent to `--quoting-style=literal`")
-                .overrides_with_all(&[
+                .overrides_with_all([
                     options::QUOTING_STYLE,
                     options::quoting::LITERAL,
                     options::quoting::ESCAPE,
@@ -1139,7 +1139,7 @@ pub fn uu_app() -> Command {
                 .short('b')
                 .long(options::quoting::ESCAPE)
                 .help("Use escape quoting style. Equivalent to `--quoting-style=escape`")
-                .overrides_with_all(&[
+                .overrides_with_all([
                     options::QUOTING_STYLE,
                     options::quoting::LITERAL,
                     options::quoting::ESCAPE,
@@ -1152,7 +1152,7 @@ pub fn uu_app() -> Command {
                 .short('Q')
                 .long(options::quoting::C)
                 .help("Use C quoting style. Equivalent to `--quoting-style=c`")
-                .overrides_with_all(&[
+                .overrides_with_all([
                     options::QUOTING_STYLE,
                     options::quoting::LITERAL,
                     options::quoting::ESCAPE,
@@ -1166,14 +1166,14 @@ pub fn uu_app() -> Command {
                 .short('q')
                 .long(options::HIDE_CONTROL_CHARS)
                 .help("Replace control characters with '?' if they are not escaped.")
-                .overrides_with_all(&[options::HIDE_CONTROL_CHARS, options::SHOW_CONTROL_CHARS])
+                .overrides_with_all([options::HIDE_CONTROL_CHARS, options::SHOW_CONTROL_CHARS])
                 .action(ArgAction::SetTrue),
         )
         .arg(
             Arg::new(options::SHOW_CONTROL_CHARS)
                 .long(options::SHOW_CONTROL_CHARS)
                 .help("Show control characters 'as is' if they are not escaped.")
-                .overrides_with_all(&[options::HIDE_CONTROL_CHARS, options::SHOW_CONTROL_CHARS])
+                .overrides_with_all([options::HIDE_CONTROL_CHARS, options::SHOW_CONTROL_CHARS])
                 .action(ArgAction::SetTrue),
         )
         // Time arguments
@@ -1192,7 +1192,7 @@ pub fn uu_app() -> Command {
                 ])
                 .hide_possible_values(true)
                 .require_equals(true)
-                .overrides_with_all(&[options::TIME, options::time::ACCESS, options::time::CHANGE]),
+                .overrides_with_all([options::TIME, options::time::ACCESS, options::time::CHANGE]),
         )
         .arg(
             Arg::new(options::time::CHANGE)
@@ -1203,7 +1203,7 @@ pub fn uu_app() -> Command {
                         time. When explicitly sorting by time (--sort=time or -t) or when not \
                         using a long listing format, sort according to the status change time.",
                 )
-                .overrides_with_all(&[options::TIME, options::time::ACCESS, options::time::CHANGE])
+                .overrides_with_all([options::TIME, options::time::ACCESS, options::time::CHANGE])
                 .action(ArgAction::SetTrue),
         )
         .arg(
@@ -1215,7 +1215,7 @@ pub fn uu_app() -> Command {
                         sorting by time (--sort=time or -t) or when not using a long listing \
                         format, sort according to the access time.",
                 )
-                .overrides_with_all(&[options::TIME, options::time::ACCESS, options::time::CHANGE])
+                .overrides_with_all([options::TIME, options::time::ACCESS, options::time::CHANGE])
                 .action(ArgAction::SetTrue),
         )
         // Hide and ignore
@@ -1251,7 +1251,7 @@ pub fn uu_app() -> Command {
                 .value_name("field")
                 .value_parser(["name", "none", "time", "size", "version", "extension"])
                 .require_equals(true)
-                .overrides_with_all(&[
+                .overrides_with_all([
                     options::SORT,
                     options::sort::SIZE,
                     options::sort::TIME,
@@ -1264,7 +1264,7 @@ pub fn uu_app() -> Command {
             Arg::new(options::sort::SIZE)
                 .short('S')
                 .help("Sort by file size, largest first.")
-                .overrides_with_all(&[
+                .overrides_with_all([
                     options::SORT,
                     options::sort::SIZE,
                     options::sort::TIME,
@@ -1278,7 +1278,7 @@ pub fn uu_app() -> Command {
             Arg::new(options::sort::TIME)
                 .short('t')
                 .help("Sort by modification time (the 'mtime' in the inode), newest first.")
-                .overrides_with_all(&[
+                .overrides_with_all([
                     options::SORT,
                     options::sort::SIZE,
                     options::sort::TIME,
@@ -1292,7 +1292,7 @@ pub fn uu_app() -> Command {
             Arg::new(options::sort::VERSION)
                 .short('v')
                 .help("Natural sort of (version) numbers in the filenames.")
-                .overrides_with_all(&[
+                .overrides_with_all([
                     options::SORT,
                     options::sort::SIZE,
                     options::sort::TIME,
@@ -1306,7 +1306,7 @@ pub fn uu_app() -> Command {
             Arg::new(options::sort::EXTENSION)
                 .short('X')
                 .help("Sort alphabetically by entry extension.")
-                .overrides_with_all(&[
+                .overrides_with_all([
                     options::SORT,
                     options::sort::SIZE,
                     options::sort::TIME,
@@ -1324,7 +1324,7 @@ pub fn uu_app() -> Command {
                     directory.  This is especially useful when listing very large directories, \
                     since not doing any sorting can be noticeably faster.",
                 )
-                .overrides_with_all(&[
+                .overrides_with_all([
                     options::SORT,
                     options::sort::SIZE,
                     options::sort::TIME,
@@ -1343,7 +1343,7 @@ pub fn uu_app() -> Command {
                     "When showing file information for a symbolic link, show information for the \
                     file the link references rather than the link itself.",
                 )
-                .overrides_with_all(&[
+                .overrides_with_all([
                     options::dereference::ALL,
                     options::dereference::DIR_ARGS,
                     options::dereference::ARGS,
@@ -1357,7 +1357,7 @@ pub fn uu_app() -> Command {
                     "Do not dereference symlinks except when they link to directories and are \
                     given as command line arguments.",
                 )
-                .overrides_with_all(&[
+                .overrides_with_all([
                     options::dereference::ALL,
                     options::dereference::DIR_ARGS,
                     options::dereference::ARGS,
@@ -1369,7 +1369,7 @@ pub fn uu_app() -> Command {
                 .short('H')
                 .long(options::dereference::ARGS)
                 .help("Do not dereference symlinks except when given as command line arguments.")
-                .overrides_with_all(&[
+                .overrides_with_all([
                     options::dereference::ALL,
                     options::dereference::DIR_ARGS,
                     options::dereference::ARGS,
@@ -1509,7 +1509,7 @@ pub fn uu_app() -> Command {
                 none (default),  slash (-p), file-type (--file-type), classify (-F)",
                 )
                 .value_parser(["none", "slash", "file-type", "classify"])
-                .overrides_with_all(&[
+                .overrides_with_all([
                     options::indicator_style::FILE_TYPE,
                     options::indicator_style::SLASH,
                     options::indicator_style::CLASSIFY,
@@ -1545,7 +1545,7 @@ pub fn uu_app() -> Command {
                 .default_missing_value("always")
                 .require_equals(true)
                 .num_args(0..=1)
-                .overrides_with_all(&[
+                .overrides_with_all([
                     options::indicator_style::FILE_TYPE,
                     options::indicator_style::SLASH,
                     options::indicator_style::CLASSIFY,
@@ -1556,7 +1556,7 @@ pub fn uu_app() -> Command {
             Arg::new(options::indicator_style::FILE_TYPE)
                 .long(options::indicator_style::FILE_TYPE)
                 .help("Same as --classify, but do not append '*'")
-                .overrides_with_all(&[
+                .overrides_with_all([
                     options::indicator_style::FILE_TYPE,
                     options::indicator_style::SLASH,
                     options::indicator_style::CLASSIFY,
@@ -1568,7 +1568,7 @@ pub fn uu_app() -> Command {
             Arg::new(options::indicator_style::SLASH)
                 .short('p')
                 .help("Append / indicator to directories.")
-                .overrides_with_all(&[
+                .overrides_with_all([
                     options::indicator_style::FILE_TYPE,
                     options::indicator_style::SLASH,
                     options::indicator_style::CLASSIFY,
@@ -1584,7 +1584,7 @@ pub fn uu_app() -> Command {
                 .value_name("TIME_STYLE")
                 .env("TIME_STYLE")
                 .value_parser(NonEmptyStringValueParser::new())
-                .overrides_with_all(&[options::TIME_STYLE]),
+                .overrides_with_all([options::TIME_STYLE]),
         )
         .arg(
             Arg::new(options::FULL_TIME)
diff --git a/src/uu/mkfifo/Cargo.toml b/src/uu/mkfifo/Cargo.toml
index f932697ff..c0c319cff 100644
--- a/src/uu/mkfifo/Cargo.toml
+++ b/src/uu/mkfifo/Cargo.toml
@@ -16,7 +16,7 @@ path = "src/mkfifo.rs"
 
 [dependencies]
 clap = { version = "4.0", features = ["wrap_help", "cargo"] }
-libc = "0.2.135"
+libc = "0.2.137"
 uucore = { version=">=0.0.16", package="uucore", path="../../uucore" }
 
 [[bin]]
diff --git a/src/uu/mknod/Cargo.toml b/src/uu/mknod/Cargo.toml
index 7e21983ff..03a09279f 100644
--- a/src/uu/mknod/Cargo.toml
+++ b/src/uu/mknod/Cargo.toml
@@ -17,7 +17,7 @@ path = "src/mknod.rs"
 
 [dependencies]
 clap = { version = "4.0", features = ["wrap_help", "cargo"] }
-libc = "^0.2.135"
+libc = "^0.2.137"
 uucore = { version=">=0.0.16", package="uucore", path="../../uucore", features=["mode"] }
 
 [[bin]]
diff --git a/src/uu/mv/src/mv.rs b/src/uu/mv/src/mv.rs
index ded46539f..4697fac4a 100644
--- a/src/uu/mv/src/mv.rs
+++ b/src/uu/mv/src/mv.rs
@@ -371,6 +371,12 @@ fn rename(from: &Path, to: &Path, b: &Behavior) -> io::Result<()> {
     let mut backup_path = None;
 
     if to.exists() {
+        if b.update && b.overwrite == OverwriteMode::Interactive {
+            // `mv -i --update old new` when `new` exists doesn't move anything
+            // and exit with 0
+            return Ok(());
+        }
+
         match b.overwrite {
             OverwriteMode::NoClobber => return Ok(()),
             OverwriteMode::Interactive => {
diff --git a/src/uu/nice/Cargo.toml b/src/uu/nice/Cargo.toml
index c062d4db3..f9ea3c38c 100644
--- a/src/uu/nice/Cargo.toml
+++ b/src/uu/nice/Cargo.toml
@@ -16,7 +16,7 @@ path = "src/nice.rs"
 
 [dependencies]
 clap = { version = "4.0", features = ["wrap_help", "cargo"] }
-libc = "0.2.135"
+libc = "0.2.137"
 nix = { version = "0.25", default-features = false }
 uucore = { version=">=0.0.16", package="uucore", path="../../uucore" }
 
diff --git a/src/uu/nohup/Cargo.toml b/src/uu/nohup/Cargo.toml
index 5603d96c0..883c90b9d 100644
--- a/src/uu/nohup/Cargo.toml
+++ b/src/uu/nohup/Cargo.toml
@@ -16,7 +16,7 @@ path = "src/nohup.rs"
 
 [dependencies]
 clap = { version = "4.0", features = ["wrap_help", "cargo"] }
-libc = "0.2.135"
+libc = "0.2.137"
 atty = "0.2"
 uucore = { version=">=0.0.16", package="uucore", path="../../uucore", features=["fs"] }
 
diff --git a/src/uu/nproc/Cargo.toml b/src/uu/nproc/Cargo.toml
index e830b06a2..057062a73 100644
--- a/src/uu/nproc/Cargo.toml
+++ b/src/uu/nproc/Cargo.toml
@@ -15,7 +15,7 @@ edition = "2021"
 path = "src/nproc.rs"
 
 [dependencies]
-libc = "0.2.135"
+libc = "0.2.137"
 num_cpus = "1.10"
 clap = { version = "4.0", features = ["wrap_help", "cargo"] }
 uucore = { version=">=0.0.16", package="uucore", path="../../uucore", features=["fs"] }
diff --git a/src/uu/numfmt/src/format.rs b/src/uu/numfmt/src/format.rs
index 3550f3bc2..b97993f21 100644
--- a/src/uu/numfmt/src/format.rs
+++ b/src/uu/numfmt/src/format.rs
@@ -161,7 +161,11 @@ fn transform_from(s: &str, opts: &TransformOptions) -> Result<f64> {
     remove_suffix(i, suffix, &opts.from).map(|n| {
         // GNU numfmt doesn't round values if no --from argument is provided by the user
         if opts.from == Unit::None {
-            n
+            if n == -0.0 {
+                0.0
+            } else {
+                n
+            }
         } else if n < 0.0 {
             -n.abs().ceil()
         } else {
@@ -268,14 +272,13 @@ fn transform_to(
     let (i2, s) = consider_suffix(s, &opts.to, round_method, precision)?;
     let i2 = i2 / (opts.to_unit as f64);
     Ok(match s {
-        None if precision > 0 => {
+        None => {
             format!(
                 "{:.precision$}",
                 round_with_precision(i2, round_method, precision),
                 precision = precision
             )
         }
-        None => format!("{}", i2),
         Some(s) if precision > 0 => {
             format!(
                 "{:.precision$}{}",
diff --git a/src/uu/numfmt/src/numfmt.rs b/src/uu/numfmt/src/numfmt.rs
index ba76b7f77..f6a1f2739 100644
--- a/src/uu/numfmt/src/numfmt.rs
+++ b/src/uu/numfmt/src/numfmt.rs
@@ -275,6 +275,7 @@ pub fn uu_app() -> Command {
                 .long(options::FIELD)
                 .help("replace the numbers in these input fields; see FIELDS below")
                 .value_name("FIELDS")
+                .allow_hyphen_values(true)
                 .default_value(options::FIELD_DEFAULT),
         )
         .arg(
diff --git a/src/uu/pathchk/Cargo.toml b/src/uu/pathchk/Cargo.toml
index b25450b89..9c77eff09 100644
--- a/src/uu/pathchk/Cargo.toml
+++ b/src/uu/pathchk/Cargo.toml
@@ -16,7 +16,7 @@ path = "src/pathchk.rs"
 
 [dependencies]
 clap = { version = "4.0", features = ["wrap_help", "cargo"] }
-libc = "0.2.135"
+libc = "0.2.137"
 uucore = { version=">=0.0.16", package="uucore", path="../../uucore" }
 
 [[bin]]
diff --git a/src/uu/pwd/src/pwd.rs b/src/uu/pwd/src/pwd.rs
index 732df19f6..b1e2b30ff 100644
--- a/src/uu/pwd/src/pwd.rs
+++ b/src/uu/pwd/src/pwd.rs
@@ -126,7 +126,10 @@ fn logical_path() -> io::Result<PathBuf> {
 #[uucore::main]
 pub fn uumain(args: impl uucore::Args) -> UResult<()> {
     let matches = uu_app().try_get_matches_from(args)?;
-    let cwd = if matches.get_flag(OPT_LOGICAL) {
+    // if POSIXLY_CORRECT is set, we want to a logical resolution.
+    // This produces a different output when doing mkdir -p a/b && ln -s a/b c && cd c && pwd
+    // We should get c in this case instead of a/b at the end of the path
+    let cwd = if matches.get_flag(OPT_LOGICAL) || env::var("POSIXLY_CORRECT").is_ok() {
         logical_path()
     } else {
         physical_path()
diff --git a/src/uu/realpath/src/realpath.rs b/src/uu/realpath/src/realpath.rs
index b5f9ebd11..5ca5d687b 100644
--- a/src/uu/realpath/src/realpath.rs
+++ b/src/uu/realpath/src/realpath.rs
@@ -130,7 +130,7 @@ pub fn uu_app() -> Command {
             Arg::new(OPT_PHYSICAL)
                 .short('P')
                 .long(OPT_PHYSICAL)
-                .overrides_with_all(&[OPT_STRIP, OPT_LOGICAL])
+                .overrides_with_all([OPT_STRIP, OPT_LOGICAL])
                 .help("resolve symlinks as encountered (default)")
                 .action(ArgAction::SetTrue),
         )
diff --git a/src/uu/rmdir/Cargo.toml b/src/uu/rmdir/Cargo.toml
index a96a2cec1..5616742a5 100644
--- a/src/uu/rmdir/Cargo.toml
+++ b/src/uu/rmdir/Cargo.toml
@@ -17,7 +17,7 @@ path = "src/rmdir.rs"
 [dependencies]
 clap = { version = "4.0", features = ["wrap_help", "cargo"] }
 uucore = { version=">=0.0.16", package="uucore", path="../../uucore", features=["fs"] }
-libc = "0.2.135"
+libc = "0.2.137"
 
 [[bin]]
 name = "rmdir"
diff --git a/src/uu/sort/src/sort.rs b/src/uu/sort/src/sort.rs
index c1bb750be..9d23034ad 100644
--- a/src/uu/sort/src/sort.rs
+++ b/src/uu/sort/src/sort.rs
@@ -1336,7 +1336,7 @@ pub fn uu_app() -> Command {
                     "version",
                     "random",
                 ])
-                .conflicts_with_all(&options::modes::ALL_SORT_MODES),
+                .conflicts_with_all(options::modes::ALL_SORT_MODES),
         )
         .arg(make_sort_mode_arg(
             options::modes::HUMAN_NUMERIC,
@@ -1373,7 +1373,7 @@ pub fn uu_app() -> Command {
                 .short('d')
                 .long(options::DICTIONARY_ORDER)
                 .help("consider only blanks and alphanumeric characters")
-                .conflicts_with_all(&[
+                .conflicts_with_all([
                     options::modes::NUMERIC,
                     options::modes::GENERAL_NUMERIC,
                     options::modes::HUMAN_NUMERIC,
@@ -1425,7 +1425,7 @@ pub fn uu_app() -> Command {
                 .short('i')
                 .long(options::IGNORE_NONPRINTING)
                 .help("ignore nonprinting characters")
-                .conflicts_with_all(&[
+                .conflicts_with_all([
                     options::modes::NUMERIC,
                     options::modes::GENERAL_NUMERIC,
                     options::modes::HUMAN_NUMERIC,
diff --git a/src/uu/split/src/split.rs b/src/uu/split/src/split.rs
index 44447e9b7..365dd279b 100644
--- a/src/uu/split/src/split.rs
+++ b/src/uu/split/src/split.rs
@@ -1221,6 +1221,47 @@ where
     Ok(())
 }
 
+fn split_into_n_chunks_by_line_round_robin<R>(
+    settings: &Settings,
+    reader: &mut R,
+    num_chunks: u64,
+) -> UResult<()>
+where
+    R: BufRead,
+{
+    // This object is responsible for creating the filename for each chunk.
+    let mut filename_iterator = FilenameIterator::new(
+        &settings.prefix,
+        &settings.additional_suffix,
+        settings.suffix_length,
+        settings.suffix_type,
+        settings.suffix_start,
+    )?;
+
+    // Create one writer for each chunk. This will create each
+    // of the underlying files (if not in `--filter` mode).
+    let mut writers = vec![];
+    for _ in 0..num_chunks {
+        let filename = filename_iterator
+            .next()
+            .ok_or_else(|| USimpleError::new(1, "output file suffixes exhausted"))?;
+        let writer = settings.instantiate_current_writer(filename.as_str())?;
+        writers.push(writer);
+    }
+
+    let num_chunks: usize = num_chunks.try_into().unwrap();
+    for (i, line_result) in reader.lines().enumerate() {
+        let line = line_result.unwrap();
+        let maybe_writer = writers.get_mut(i % num_chunks);
+        let writer = maybe_writer.unwrap();
+        let bytes = line.as_bytes();
+        writer.write_all(bytes)?;
+        writer.write_all(b"\n")?;
+    }
+
+    Ok(())
+}
+
 fn split(settings: &Settings) -> UResult<()> {
     let mut reader = BufReader::new(if settings.input == "-" {
         Box::new(stdin()) as Box<dyn Read>
@@ -1247,6 +1288,9 @@ fn split(settings: &Settings) -> UResult<()> {
             let chunk_number = chunk_number - 1;
             kth_chunk_by_line(settings, &mut reader, chunk_number, num_chunks)
         }
+        Strategy::Number(NumberType::RoundRobin(num_chunks)) => {
+            split_into_n_chunks_by_line_round_robin(settings, &mut reader, num_chunks)
+        }
         Strategy::Number(_) => Err(USimpleError::new(1, "-n mode not yet fully implemented")),
         Strategy::Lines(chunk_size) => {
             let mut writer = LineChunkWriter::new(chunk_size, settings)?;
diff --git a/src/uu/sync/Cargo.toml b/src/uu/sync/Cargo.toml
index dc5754e43..3558868a5 100644
--- a/src/uu/sync/Cargo.toml
+++ b/src/uu/sync/Cargo.toml
@@ -16,7 +16,7 @@ path = "src/sync.rs"
 
 [dependencies]
 clap = { version = "4.0", features = ["wrap_help", "cargo"] }
-libc = "0.2.135"
+libc = "0.2.137"
 uucore = { version=">=0.0.16", package="uucore", path="../../uucore", features=["wide"] }
 
 [target.'cfg(any(target_os = "linux", target_os = "android"))'.dependencies]
diff --git a/src/uu/tail/Cargo.toml b/src/uu/tail/Cargo.toml
index a912bf352..4c2552d0c 100644
--- a/src/uu/tail/Cargo.toml
+++ b/src/uu/tail/Cargo.toml
@@ -17,7 +17,7 @@ path = "src/tail.rs"
 
 [dependencies]
 clap = { version = "4.0", features = ["wrap_help", "cargo"] }
-libc = "0.2.135"
+libc = "0.2.137"
 memchr = "2.5.0"
 notify = { version = "=5.0.0", features=["macos_kqueue"]}
 uucore = { version=">=0.0.16", package="uucore", path="../../uucore", features=["ringbuffer", "lines"] }
diff --git a/src/uu/tail/src/args.rs b/src/uu/tail/src/args.rs
index 4c3f0c56d..6bc9baf0b 100644
--- a/src/uu/tail/src/args.rs
+++ b/src/uu/tail/src/args.rs
@@ -334,7 +334,7 @@ pub fn uu_app() -> Command {
                 .short('c')
                 .long(options::BYTES)
                 .allow_hyphen_values(true)
-                .overrides_with_all(&[options::BYTES, options::LINES])
+                .overrides_with_all([options::BYTES, options::LINES])
                 .help("Number of bytes to print"),
         )
         .arg(
@@ -352,7 +352,7 @@ pub fn uu_app() -> Command {
                 .short('n')
                 .long(options::LINES)
                 .allow_hyphen_values(true)
-                .overrides_with_all(&[options::BYTES, options::LINES])
+                .overrides_with_all([options::BYTES, options::LINES])
                 .help("Number of lines to print"),
         )
         .arg(
@@ -366,7 +366,7 @@ pub fn uu_app() -> Command {
                 .short('q')
                 .long(options::verbosity::QUIET)
                 .visible_alias("silent")
-                .overrides_with_all(&[options::verbosity::QUIET, options::verbosity::VERBOSE])
+                .overrides_with_all([options::verbosity::QUIET, options::verbosity::VERBOSE])
                 .help("Never output headers giving file names")
                 .action(ArgAction::SetTrue),
         )
@@ -392,7 +392,7 @@ pub fn uu_app() -> Command {
             Arg::new(options::verbosity::VERBOSE)
                 .short('v')
                 .long(options::verbosity::VERBOSE)
-                .overrides_with_all(&[options::verbosity::QUIET, options::verbosity::VERBOSE])
+                .overrides_with_all([options::verbosity::QUIET, options::verbosity::VERBOSE])
                 .help("Always output headers giving file names")
                 .action(ArgAction::SetTrue),
         )
@@ -421,7 +421,7 @@ pub fn uu_app() -> Command {
             Arg::new(options::FOLLOW_RETRY)
                 .short('F')
                 .help("Same as --follow=name --retry")
-                .overrides_with_all(&[options::RETRY, options::FOLLOW])
+                .overrides_with_all([options::RETRY, options::FOLLOW])
                 .action(ArgAction::SetTrue),
         )
         .arg(
diff --git a/src/uu/tee/Cargo.toml b/src/uu/tee/Cargo.toml
index 311e09875..b9c6a36a9 100644
--- a/src/uu/tee/Cargo.toml
+++ b/src/uu/tee/Cargo.toml
@@ -16,7 +16,7 @@ path = "src/tee.rs"
 
 [dependencies]
 clap = { version = "4.0", features = ["wrap_help", "cargo"] }
-libc = "0.2.135"
+libc = "0.2.137"
 retain_mut = "=0.1.7" # ToDO: [2021-01-01; rivy; maint/MinSRV] ~ v0.1.5 uses const generics which aren't stabilized until rust v1.51.0
 uucore = { version=">=0.0.16", package="uucore", path="../../uucore", features=["libc"] }
 
diff --git a/src/uu/test/Cargo.toml b/src/uu/test/Cargo.toml
index 28b7362b1..f1ae083e0 100644
--- a/src/uu/test/Cargo.toml
+++ b/src/uu/test/Cargo.toml
@@ -16,7 +16,7 @@ path = "src/test.rs"
 
 [dependencies]
 clap = { version = "4.0", features = ["wrap_help", "cargo"] }
-libc = "0.2.135"
+libc = "0.2.137"
 uucore = { version=">=0.0.16", package="uucore", path="../../uucore" }
 
 [target.'cfg(target_os = "redox")'.dependencies]
diff --git a/src/uu/test/src/test.rs b/src/uu/test/src/test.rs
index aaeb351e5..bc274bc8b 100644
--- a/src/uu/test/src/test.rs
+++ b/src/uu/test/src/test.rs
@@ -452,18 +452,18 @@ mod tests {
     fn test_integer_op() {
         let a = OsStr::new("18446744073709551616");
         let b = OsStr::new("0");
-        assert_eq!(integers(a, b, OsStr::new("-lt")).unwrap(), false);
+        assert!(!integers(a, b, OsStr::new("-lt")).unwrap());
         let a = OsStr::new("18446744073709551616");
         let b = OsStr::new("0");
-        assert_eq!(integers(a, b, OsStr::new("-gt")).unwrap(), true);
+        assert!(integers(a, b, OsStr::new("-gt")).unwrap());
         let a = OsStr::new("-1");
         let b = OsStr::new("0");
-        assert_eq!(integers(a, b, OsStr::new("-lt")).unwrap(), true);
+        assert!(integers(a, b, OsStr::new("-lt")).unwrap());
         let a = OsStr::new("42");
         let b = OsStr::new("42");
-        assert_eq!(integers(a, b, OsStr::new("-eq")).unwrap(), true);
+        assert!(integers(a, b, OsStr::new("-eq")).unwrap());
         let a = OsStr::new("42");
         let b = OsStr::new("42");
-        assert_eq!(integers(a, b, OsStr::new("-ne")).unwrap(), false);
+        assert!(!integers(a, b, OsStr::new("-ne")).unwrap());
     }
 }
diff --git a/src/uu/timeout/Cargo.toml b/src/uu/timeout/Cargo.toml
index 77adcfe57..6c42553a9 100644
--- a/src/uu/timeout/Cargo.toml
+++ b/src/uu/timeout/Cargo.toml
@@ -16,7 +16,7 @@ path = "src/timeout.rs"
 
 [dependencies]
 clap = { version = "4.0", features = ["wrap_help", "cargo"] }
-libc = "0.2.135"
+libc = "0.2.137"
 nix = { version = "0.25", default-features = false, features = ["signal"] }
 uucore = { version=">=0.0.16", package="uucore", path="../../uucore", features=["process", "signals"] }
 
diff --git a/src/uu/touch/src/touch.rs b/src/uu/touch/src/touch.rs
index f397d2eaf..39f328d87 100644
--- a/src/uu/touch/src/touch.rs
+++ b/src/uu/touch/src/touch.rs
@@ -254,7 +254,7 @@ pub fn uu_app() -> Command {
                 .value_parser(ValueParser::os_string())
                 .value_hint(clap::ValueHint::AnyPath),
         )
-        .group(ArgGroup::new(options::SOURCES).args(&[
+        .group(ArgGroup::new(options::SOURCES).args([
             options::sources::CURRENT,
             options::sources::DATE,
             options::sources::REFERENCE,
diff --git a/src/uu/uniq/src/uniq.rs b/src/uu/uniq/src/uniq.rs
index 45f5c05f2..a66393acb 100644
--- a/src/uu/uniq/src/uniq.rs
+++ b/src/uu/uniq/src/uniq.rs
@@ -336,7 +336,7 @@ pub fn uu_app() -> Command {
                 .num_args(0..=1)
                 .default_missing_value("separate")
                 .require_equals(true)
-                .conflicts_with_all(&[
+                .conflicts_with_all([
                     options::REPEATED,
                     options::ALL_REPEATED,
                     options::UNIQUE,
diff --git a/src/uu/who/src/who.rs b/src/uu/who/src/who.rs
index 4729d68ac..d41ce1e79 100644
--- a/src/uu/who/src/who.rs
+++ b/src/uu/who/src/who.rs
@@ -250,7 +250,7 @@ pub fn uu_app() -> Command {
                 .long(options::MESG)
                 .short('T')
                 .visible_short_alias('w')
-                .visible_aliases(&["message", "writable"])
+                .visible_aliases(["message", "writable"])
                 .help("add user's message status as +, - or ?")
                 .action(ArgAction::SetTrue),
         )
@@ -350,7 +350,7 @@ impl Who {
             println!("{}", users.join(" "));
             println!("# users={}", users.len());
         } else {
-            let records = Utmpx::iter_all_records_from(f).peekable();
+            let records = Utmpx::iter_all_records_from(f);
 
             if self.include_heading {
                 self.print_heading();
diff --git a/src/uu/whoami/Cargo.toml b/src/uu/whoami/Cargo.toml
index f3a277e89..4c1b5c2ab 100644
--- a/src/uu/whoami/Cargo.toml
+++ b/src/uu/whoami/Cargo.toml
@@ -22,7 +22,7 @@ uucore = { version=">=0.0.16", package="uucore", path="../../uucore", features=[
 windows-sys = { version = "0.42.0", default-features = false, features = ["Win32_NetworkManagement_NetManagement", "Win32_System_WindowsProgramming", "Win32_Foundation"] }
 
 [target.'cfg(unix)'.dependencies]
-libc = "0.2.135"
+libc = "0.2.137"
 
 [[bin]]
 name = "whoami"
diff --git a/src/uu/yes/Cargo.toml b/src/uu/yes/Cargo.toml
index 677d60a5f..1f2db513b 100644
--- a/src/uu/yes/Cargo.toml
+++ b/src/uu/yes/Cargo.toml
@@ -16,7 +16,7 @@ path = "src/yes.rs"
 
 [dependencies]
 clap = { version = "4.0", features = ["wrap_help", "cargo"] }
-libc = "0.2.135"
+libc = "0.2.137"
 uucore = { version=">=0.0.16", package="uucore", path="../../uucore", features=["pipes"] }
 
 [target.'cfg(any(target_os = "linux", target_os = "android"))'.dependencies]
diff --git a/src/uucore/Cargo.toml b/src/uucore/Cargo.toml
index f0527612f..fa1c1d74b 100644
--- a/src/uucore/Cargo.toml
+++ b/src/uucore/Cargo.toml
@@ -32,7 +32,7 @@ time = { version="0.3", optional=true, features = ["formatting", "local-offset",
 data-encoding = { version="2.1", optional=true }
 data-encoding-macro = { version="0.1.12", optional=true }
 z85 = { version="3.0.5", optional=true }
-libc = { version="0.2.135", optional=true }
+libc = { version="0.2.137", optional=true }
 once_cell = "1.13.1"
 os_display = "0.1.3"
 
diff --git a/tests/by-util/test_chown.rs b/tests/by-util/test_chown.rs
index b54412857..716e7f48f 100644
--- a/tests/by-util/test_chown.rs
+++ b/tests/by-util/test_chown.rs
@@ -423,6 +423,38 @@ fn test_chown_only_user_id() {
         .stderr_contains("failed to change");
 }
 
+#[test]
+fn test_chown_fail_id() {
+    // test chown 1111. file.txt
+
+    let scene = TestScenario::new(util_name!());
+    let at = &scene.fixtures;
+
+    let result = scene.cmd_keepenv("id").arg("-u").run();
+    if skipping_test_is_okay(&result, "id: cannot find name for group ID") {
+        return;
+    }
+    let user_id = String::from(result.stdout_str().trim());
+    assert!(!user_id.is_empty());
+
+    let file1 = "test_chown_file1";
+    at.touch(file1);
+
+    scene
+        .ucmd()
+        .arg(format!("{}:", user_id))
+        .arg(file1)
+        .fails()
+        .stderr_contains("invalid spec");
+
+    scene
+        .ucmd()
+        .arg(format!("{}.", user_id))
+        .arg(file1)
+        .fails()
+        .stderr_contains("invalid spec");
+}
+
 /// Test for setting the owner to a user ID for a user that does not exist.
 ///
 /// For example:
@@ -708,7 +740,7 @@ fn test_chown_file_notexisting() {
         .fails();
 
     // TODO: uncomment once "failed to change ownership of '{}' to {}" added to stdout
-    // result.stderr_contains(&"retained as");
+    // result.stderr_contains("retained as");
     // TODO: uncomment once message changed from "cannot dereference" to "cannot access"
-    // result.stderr_contains(&"cannot access 'not_existing': No such file or directory");
+    // result.stderr_contains("cannot access 'not_existing': No such file or directory");
 }
diff --git a/tests/by-util/test_cp.rs b/tests/by-util/test_cp.rs
index 8860a57a5..5a97db0bd 100644
--- a/tests/by-util/test_cp.rs
+++ b/tests/by-util/test_cp.rs
@@ -216,16 +216,31 @@ fn test_cp_target_directory_is_file() {
 }
 
 #[test]
-fn test_cp_arg_interactive() {
+fn test_cp_arg_update_interactive() {
     new_ucmd!()
         .arg(TEST_HELLO_WORLD_SOURCE)
         .arg(TEST_HOW_ARE_YOU_SOURCE)
         .arg("-i")
+        .arg("--update")
+        .succeeds()
+        .no_stdout()
+        .no_stderr();
+}
+
+#[test]
+fn test_cp_arg_interactive() {
+    let (at, mut ucmd) = at_and_ucmd!();
+    at.touch("a");
+    at.touch("b");
+    // TODO The prompt in GNU cp is different, and it doesn't have the
+    // response either.
+    //
+    // See <https://github.com/uutils/coreutils/issues/4023>.
+    ucmd.args(&["-i", "a", "b"])
         .pipe_in("N\n")
         .succeeds()
         .no_stdout()
-        .stderr_contains(format!("overwrite '{}'?", TEST_HOW_ARE_YOU_SOURCE))
-        .stderr_contains("Not overwriting");
+        .stderr_is("cp: overwrite 'b'?  [y/N]: cp: Not overwriting 'b' at user request\n");
 }
 
 #[test]
@@ -1996,6 +2011,19 @@ fn test_copy_same_symlink_no_dereference_dangling() {
     ucmd.args(&["-d", "a", "b"]).succeeds();
 }
 
+#[cfg(not(windows))]
+#[test]
+fn test_cp_parents_2_dirs() {
+    let (at, mut ucmd) = at_and_ucmd!();
+    at.mkdir_all("a/b/c");
+    at.mkdir("d");
+    ucmd.args(&["-a", "--parents", "a/b/c", "d"])
+        .succeeds()
+        .no_stderr()
+        .no_stdout();
+    assert!(at.dir_exists("d/a/b/c"));
+}
+
 #[test]
 #[ignore = "issue #3332"]
 fn test_cp_parents_2() {
diff --git a/tests/by-util/test_ls.rs b/tests/by-util/test_ls.rs
index 310c84290..0b3b3f788 100644
--- a/tests/by-util/test_ls.rs
+++ b/tests/by-util/test_ls.rs
@@ -1863,7 +1863,7 @@ fn test_ls_recursive() {
     #[cfg(not(windows))]
     result.stdout_contains("a/b:\nb");
     #[cfg(windows)]
-    result.stdout_contains(&"a\\b:\nb");
+    result.stdout_contains("a\\b:\nb");
 }
 
 #[test]
@@ -2093,13 +2093,13 @@ fn test_ls_indicator_style() {
             .ucmd()
             .arg(format!("--indicator-style={}", opt))
             .succeeds()
-            .stdout_contains(&"/");
+            .stdout_contains("/");
     }
 
     // Same test as above, but with the alternate flags.
     let options = vec!["--classify", "--file-type", "-p"];
     for opt in options {
-        scene.ucmd().arg(opt).succeeds().stdout_contains(&"/");
+        scene.ucmd().arg(opt).succeeds().stdout_contains("/");
     }
 
     // Classify and File-Type all contain indicators for pipes and links.
@@ -2110,7 +2110,7 @@ fn test_ls_indicator_style() {
             .ucmd()
             .arg(format!("--indicator-style={}", opt))
             .succeeds()
-            .stdout_contains(&"@");
+            .stdout_contains("@");
     }
 }
 
@@ -3195,7 +3195,7 @@ fn test_ls_context_format() {
     ] {
         let format = format!("--format={}", word);
         ts.ucmd()
-            .args(&[&"-Z", &format.as_str(), &"/"])
+            .args(&["-Z", format.as_str(), "/"])
             .succeeds()
             .stdout_only(
                 unwrap_or_return!(expected_result(&ts, &["-Z", format.as_str(), "/"])).stdout_str(),
diff --git a/tests/by-util/test_mv.rs b/tests/by-util/test_mv.rs
index 200053ba6..9dd06c9f1 100644
--- a/tests/by-util/test_mv.rs
+++ b/tests/by-util/test_mv.rs
@@ -184,6 +184,25 @@ fn test_mv_interactive() {
     assert!(at.file_exists(file_b));
 }
 
+#[test]
+fn test_mv_arg_update_interactive() {
+    let (at, mut ucmd) = at_and_ucmd!();
+
+    let file_a = "test_mv_replace_file_a";
+    let file_b = "test_mv_replace_file_b";
+
+    at.touch(file_a);
+    at.touch(file_b);
+
+    ucmd.arg(file_a)
+        .arg(file_b)
+        .arg("-i")
+        .arg("--update")
+        .succeeds()
+        .no_stdout()
+        .no_stderr();
+}
+
 #[test]
 fn test_mv_no_clobber() {
     let (at, mut ucmd) = at_and_ucmd!();
diff --git a/tests/by-util/test_numfmt.rs b/tests/by-util/test_numfmt.rs
index b12ea2d50..49de861fb 100644
--- a/tests/by-util/test_numfmt.rs
+++ b/tests/by-util/test_numfmt.rs
@@ -184,6 +184,11 @@ fn test_negative() {
         .stdout_is("-1.0Ki\n-1.2Mi\n-103Mi\n");
 }
 
+#[test]
+fn test_negative_zero() {
+    new_ucmd!().pipe_in("-0\n-0.0").run().stdout_is("0\n0.0\n");
+}
+
 #[test]
 fn test_no_op() {
     new_ucmd!()
@@ -370,6 +375,14 @@ fn test_format_selected_fields() {
         .stdout_only("1000 2K 3000 4000 5K 6K\n");
 }
 
+#[test]
+fn test_format_implied_range_and_field() {
+    new_ucmd!()
+        .args(&["--from=auto", "--field", "-2,4", "1K 2K 3K 4K 5K 6K"])
+        .succeeds()
+        .stdout_only("1000 2000 3K 4000 5K 6K\n");
+}
+
 #[test]
 fn test_should_succeed_if_selected_field_out_of_range() {
     new_ucmd!()
@@ -525,7 +538,7 @@ fn test_round() {
         new_ucmd!()
             .args(&[
                 "--to=si",
-                &format!("--round={}", method),
+                &format!("--round={method}"),
                 "--",
                 "9001",
                 "-9001",
@@ -537,6 +550,32 @@ fn test_round() {
     }
 }
 
+#[test]
+fn test_round_with_to_unit() {
+    for (method, exp) in [
+        ("from-zero", ["6", "-6", "5.9", "-5.9", "5.86", "-5.86"]),
+        ("towards-zero", ["5", "-5", "5.8", "-5.8", "5.85", "-5.85"]),
+        ("up", ["6", "-5", "5.9", "-5.8", "5.86", "-5.85"]),
+        ("down", ["5", "-6", "5.8", "-5.9", "5.85", "-5.86"]),
+        ("nearest", ["6", "-6", "5.9", "-5.9", "5.86", "-5.86"]),
+    ] {
+        new_ucmd!()
+            .args(&[
+                "--to-unit=1024",
+                &format!("--round={method}"),
+                "--",
+                "6000",
+                "-6000",
+                "6000.0",
+                "-6000.0",
+                "6000.00",
+                "-6000.00",
+            ])
+            .succeeds()
+            .stdout_only(exp.join("\n") + "\n");
+    }
+}
+
 #[test]
 fn test_suffix_is_added_if_not_supplied() {
     new_ucmd!()
diff --git a/tests/by-util/test_pwd.rs b/tests/by-util/test_pwd.rs
index 0ae63c895..0ae0cc909 100644
--- a/tests/by-util/test_pwd.rs
+++ b/tests/by-util/test_pwd.rs
@@ -90,6 +90,35 @@ fn test_symlinked_default() {
     env.ucmd.succeeds().stdout_is(env.subdir + "\n");
 }
 
+#[test]
+fn test_symlinked_default_posix() {
+    let mut env = symlinked_env();
+    env.ucmd
+        .env("POSIXLY_CORRECT", "1")
+        .succeeds()
+        .stdout_is(env.symdir.clone() + "\n");
+}
+
+#[test]
+fn test_symlinked_default_posix_l() {
+    let mut env = symlinked_env();
+    env.ucmd
+        .env("POSIXLY_CORRECT", "1")
+        .arg("-L")
+        .succeeds()
+        .stdout_is(env.symdir + "\n");
+}
+
+#[test]
+fn test_symlinked_default_posix_p() {
+    let mut env = symlinked_env();
+    env.ucmd
+        .env("POSIXLY_CORRECT", "1")
+        .arg("-P")
+        .succeeds()
+        .stdout_is(env.symdir + "\n");
+}
+
 #[cfg(not(windows))]
 pub mod untrustworthy_pwd_var {
     use std::path::Path;
diff --git a/tests/by-util/test_split.rs b/tests/by-util/test_split.rs
index 7d7bb3929..85f3e7eea 100644
--- a/tests/by-util/test_split.rs
+++ b/tests/by-util/test_split.rs
@@ -743,3 +743,19 @@ fn test_hex_suffix() {
     assert_eq!(at.read("x0b"), "c");
     assert_eq!(at.read("x0c"), "");
 }
+
+#[test]
+fn test_round_robin() {
+    let (at, mut ucmd) = at_and_ucmd!();
+
+    let file_read = |f| {
+        let mut s = String::new();
+        at.open(f).read_to_string(&mut s).unwrap();
+        s
+    };
+
+    ucmd.args(&["-n", "r/2", "fivelines.txt"]).succeeds();
+
+    assert_eq!(file_read("xaa"), "1\n3\n5\n");
+    assert_eq!(file_read("xab"), "2\n4\n");
+}
diff --git a/tests/common/random.rs b/tests/common/random.rs
index 0e422572f..29f3d2775 100644
--- a/tests/common/random.rs
+++ b/tests/common/random.rs
@@ -58,11 +58,11 @@ impl Distribution<u8> for AlphanumericNewline {
 /// use rand::distributions::Alphanumeric;
 ///
 /// // generates a 100 byte string with characters from AlphanumericNewline
-/// let random_string = RandomString::generate(&AlphanumericNewline, 100);
+/// let random_string = RandomString::generate(AlphanumericNewline, 100);
 /// assert_eq!(100, random_string.len());
 ///
 /// // generates a 100 byte string with 10 newline characters not ending with a newline
-/// let string = RandomString::generate_with_delimiter(&Alphanumeric, b'\n', 10, false, 100);
+/// let string = RandomString::generate_with_delimiter(Alphanumeric, b'\n', 10, false, 100);
 /// assert_eq!(100, random_string.len());
 /// ```
 pub struct RandomString;
@@ -108,7 +108,7 @@ impl RandomString {
     /// use crate::common::random::{AlphanumericNewline, RandomString};
     ///
     /// // generates a 100 byte string with 10 '\0' byte characters not ending with a '\0' byte
-    /// let string = RandomString::generate_with_delimiter(&AlphanumericNewline, 0, 10, false, 100);
+    /// let string = RandomString::generate_with_delimiter(AlphanumericNewline, 0, 10, false, 100);
     /// assert_eq!(100, random_string.len());
     /// assert_eq!(
     ///     10,