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Ps

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Man page:ps

Usage

Report a snapshot of the current processes.

shell

ps OPTIONS

Option	Description
`a`	List all processes with a terminal (tty), or all processes if used with the `x` option..
`u`	Display user-oriented format.
`x`	Lift the BSD-style "must have a tty" restriction.
`-A` `-e`	Select all processes.
`-f`	Do full-format listing.
`-O`	Add new columns to the output. Ex: `ppid` `ni` (nice)
`-o`	Customize columns to be shown. Ex: `pid` `comm`

See only processes started in this shell:

shell

ps

See all running processes with arguments:

shell

ps aux
ps -ef

Check nice value of running processes:

shell

ps -eO ni
ps -eo pid,ni,comm