this manner is in
              addition to the set of processes selected  by  other  means.   An
              alternate  description  is that this option causes ps to list all
              processes owned by  you  (same  EUID  as  ps),  or  to  list  all
              processes when used together with the a option.

PROCESS SELECTION BY LIST
       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