Displays the status of processes (programs) running in the system.
[notice]Note that unlike other commands ps command options do not have a prefix “-“.[/notice]
a display processes of other users.
f displays a tree of processes.
j displays the output using the format jobs.
l displays the data in long format, with detailed information about each process. m displays information about memory usage of each process.
u displays the user name and start time.
x displays processes that are not associated with any terminal.
The ps command displays the status of processes running on the system. The ps command without parameters to generate a list of processes you run. To view a list of all processes running on the system, type ps ax (or ps aux, if you want more information for each process).