Report on active processes. ps has three types of options. GNU long
options start with two dashes, which are required. BSD options may
be grouped and do not start with a dash, while Unix98 options may
be grouped and require an initial dash. The meaning of the short
options can vary depending on whether or not there is a dash. In
options, list arguments should either be
separated by commas or put in double quotes. In comparing the
amount of output produced, note that
e prints more than
l prints more than
f for each entry.
Include only specified processes, which are given in a space-delimited list.
Include only specified session IDs, which are given in a space-delimited list.
a, list all processes on a terminal. As
-a, list all processes on a terminal except session leaders.
c, show the true command name. As
-c, show different scheduler information with
Select by command name.
Set the output width (the number of columns to display).
Select all processes except session leaders.
Select all processes.
Include environment information after the command.
-f, display full listing. As
--forest, display “forest” family tree format, with ASCII art showing the relationships.
-g, select by session leader if list contains numbers, or by group if it contains group ...