ps
Displays process status
ps [options][process-list]
The ps utility displays status information about processes.
Arguments
The process-list is a comma- or SPACE-separated list of PID numbers. When you specify a process-list, ps reports only on processes in that list. The process-list must follow all options on the command line.
Options
The version of ps that Red Hat includes takes three types of options, each preceded by a different prefix. You can intermix the options.
Two hyphens: GNU options
One hyphen: UNIX98 options
No hyphens: BSD options
-A
all Reports on all processes. Also -e.
-e
everything Reports on all processes. Also -A.
-f
full Displays a listing with more columns of information.
--forest
Displays the process tree.
-l
long Produces ...
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