serenity/Base/usr/share/man/man1/rev.md

Name

rev - reverse lines

Synopsis

$ rev [file...]

Description

rev reads the specified files line by line, and prints them to standard output with each line being reversed characterwise. If no files are specified, then rev will read from standard input. If the file - is specified then rev also reads from standard input.

Arguments

• file: Files to print

Examples

To print two files 'foo' and 'bar' in reverse:

$ cat foo bar
foo 1
foo 2
bar 1
bar 2
$ rev foo bar
1 oof
2 oof
1 rab
2 rab

To list files with their names in reverse:

$ ls
foo
bar
$ ls | rev
oof
rab

To print a file 'foo' in reverse followed by the output of ls in reverse:

$ cat foo
foo 1
foo 2
$ ls
foo
bar
$ ls | rev foo -
1 oof
2 oof
oof
rab