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This option allows the user to change which colums are displayed by giving comma or space separated list of column format specifiers. A column format specifier is of the form: `COLUMN_NAME[=COLUMN_TITLE]`. Where `COLUMN_NAME` is any of: uid, pid, ppid, pgid, sid, state, tty, or cmd. Specifying a `COLUMN_TITLE` will change the name shown in the column header. `COLUMN_TITLE` may be blank. If all given column titles are blank, the header is omitted.
63 lines
2.3 KiB
Markdown
63 lines
2.3 KiB
Markdown
## Name
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ps - list currently running processes
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## Synopsis
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```**sh
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$ ps [--version] [-a] [-A] [-e] [-f] [-o column-format] [-p pid-list] [--ppid pid-list] [-q pid-list] [-t tty-list] [-u user-list]
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```
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## Description
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Print a list of currently running processes in the current TTY.
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For each process, print its PID (process ID), to which TTY it belongs, and invoking commandline (CMD).
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## Options
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* `-a`: Consider all processes that are associated with a TTY.
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* `-A` or `-e`: Consider all processes, not just those in the current TTY.
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* `-f`: Also print for each process: UID (as resolved username), PPID (parent PID), and STATE (Runnable, Sleeping, Selecting, Reading, etc.)
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* `-o column-format`: Specify a user-defined format, as a list of column format specifiers separated by commas or spaces.
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A column format specifier is of the form: `COLUMN_NAME[=COLUMN_TITLE]`.
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Where `COLUMN_NAME` is any of the following: `uid`, `pid`, `ppid`, `pgid`, `sid`, `state`, `tty`, or `cmd`.
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Specifying a `COLUMN_TITLE` will change the name shown in the column header. `COLUMN_TITLE` may be blank.
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If all given column titles are blank, the column header is omitted.
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* `-p pid-list`: Select processes matching any of the given PIDs. `pid-list` is a list of PIDs, separated by commas or spaces.
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* `--ppid pid-list`: Select processes whose PPID matches any of the given PIDs. `pid-list` is a list of PIDs, separated by commas or spaces.
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* `-q pid-list`: Only consider the given PIDs, if they exist. Output the processes in the order provided by `pid-list`. `pid-list` is a list of PIDs, separated by commas or spaces.
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* `-t tty-list`: Select processes associated with any of the given terminals. `tty-list` is a list of short TTY names (e.g: `pts:0`) or the full TTY device paths, separated by commas or spaces.
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* `-u user-list`: Select processes matching any of the given UIDs. `user-list` is a list of UIDs or login names, separated by commas or spaces.
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## Examples
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Show all processes (full format):
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```sh
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$ ps -ef
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```
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Show the PID, state and name of all processes
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```sh
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$ ps -eo pid,state,cmd
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```
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Show the name and state of PID 42 and rename the first column from CMD to Command:
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```sh
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$ ps -q 42 -o cmd=Command,state
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```
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Show name of PID 42 and omit the header entirely
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```sh
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$ ps -q 42 -o cmd=
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```
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## See Also
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* [`pmap`(1)](help://man/1/pmap)
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* [`lsof`(1)](help://man/1/lsof)
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