These options accept a single argument in the form of a
blank-separated or comma-separated list. They can be used
multiple times. For example: ps -p "1 2" -p 3,4
-123 Identical to --pid 123.
123 Identical to --pid 123.
-C cmdlist
Select by command name. This selects the processes whose
executable name is given in cmdlist. NOTE: The command
name is not the same as the command line. Previous
versions of procps and the kernel truncated this command
name to 15 characters. This limitation is no longer
present in both. If you depended on matching only 15
characters, you may no longer get a match.
-G grplist
Select by real group ID (RGID) or name. This selects the
processes whose real group name or ID is in the grplist
list. The real group ID identifies the group of the user
who created the process, see getgid(2).
-g grplist
Select by session OR by effective group name. Selection
by session is specified by many standards, but selection
by effective group is the logical behavior that several
other operating systems use. This ps will select by
session when the list is completely numeric (as sessions
are). Group ID numbers will work only when some group
names are also specified. See the -s and --group options.
--Group grplist
Select by real group ID (RGID) or name. Identical to -G.
--group grplist
Select by effective group ID (EGID) or name. This selects
the processes whose effective group name or ID is in
grplist. The effective group ID describes the group whose
file access permissions are used by the process (see
getegid(2)). The -g option is often an alternative to
--group.
p pidlist
Select by process ID. Identical to -p and --pid.
-p pidlist
Select by PID. This selects the processes whose process
ID numbers appear in pidlist. Identical to p and --pid.
--pid pidlist
Select by process ID. Identical to -p and p.
--ppid pidlist
Select by parent process ID. This selects the processes
with a parent process ID in pidlist. That is, it selects
processes that are children of those listed in pidlist.
q pidlist
Select by process ID (quick mode). Identical to -q and
--quick-pid.
-q pidlist
Select by PID (quick mode). This selects the processes
whose process ID numbers appear in pidlist. With this
option ps reads the necessary info only for the pids
listed in the pidlist and doesn't apply additional
filtering rules. The order of pids is unsorted and
preserved. No additional selection options, sorting and
forest type listings are allowed in this mode. Identical
to q and --quick-pid.
--quick-pid pidlist
Select by process ID (quick mode). Identical to -q and q.
-s sesslist
Select by session ID. This selects the processes with a
session ID specified in sesslist.
--sid sesslist
Select by session ID. Identical to -s.
t ttylist
Select by tty. Nearly identical to -t and --tty, but can
also be used with an empty ttylist to indicate the
terminal associated with ps. Using the T option is
considered cleaner than using t with an empty ttylist.
-t ttylist
Select by tty. This selects the processes associated with
the terminals given in ttylist. Terminals (ttys, or
screens for text output) can be specified in several
forms: /dev/ttyS1, ttyS1, S1. A plain "-" may be used to
select processes not attached to any terminal.
--tty ttylist
Select by terminal. Identical to -t and t.
U userlist
Select by effective user ID (EUID) or name. This selects
the processes whose effective user name or ID is in
userlist. The effective user ID describes the user whose
file access permissions are used by the process (see
geteuid(2)). Identical to -u and --user.
-U userlist
Select by real user ID (RUID) or name. It selects the
processes whose real user name or ID is in the userlist
list. The real user ID identifies the user who created
the process, see getuid(2).
-u userlist
Select by effective user ID (EUID) or name. This selects
the processes whose effective user name or ID is in
userlist.
The effective user ID describes the user whose file access
permissions are used by the process (see geteuid(2)).
Identical to U and --user.
--User userlist
Select by real user ID (RUID) or name. Identical to -U.
--user userlist
Select by effective user ID (EUID) or name. Identical to
-u and U.
