'ps' arguments to display PID, PPID, PGID, and SID collectively
Here you go:
$ ps xao pid,ppid,pgid,sid | head
PID PPID PGID SID
1 0 1 1
2 0 0 0
3 2 0 0
6 2 0 0
7 2 0 0
21 2 0 0
22 2 0 0
23 2 0 0
24 2 0 0
If you want to see the process' name as well, use this:
$ ps xao pid,ppid,pgid,sid,comm | head
PID PPID PGID SID COMMAND
1 0 1 1 init
2 0 0 0 kthreadd
3 2 0 0 ksoftirqd/0
6 2 0 0 migration/0
7 2 0 0 watchdog/0
21 2 0 0 cpuset
22 2 0 0 khelper
23 2 0 0 kdevtmpfs
24 2 0 0 netns
Try
ps -efj | less
Specifically, if you want to find out PID/PGID/PPID/SID for a certain ProcessName or PID, Try:
ps -efj | grep ProcessName
ps -efj | grep PID
OR for better-formatted output, try:
ps -ejf | egrep 'STIME|ProcessName'
ps -ejf | egrep 'STIME|pid'
Examples
:
ps -ejf | egrep 'STIME|http'
ps -ejf | egrep 'STIME|1234'
SAMPLE:
[ram@thinkred1cartoon ~]$ ps -ejf | egrep 'STIME|http'
UID PID PPID PGID SID C STIME TTY TIME CMD
root 1450 1 1450 1450 0 08:45 ? 00:00:04 /usr/sbin/httpd -DFOREGROUND
ram 3717 1 2589 2589 0 08:47 ? 00:00:00 /usr/libexec/gvfsd-http --spawner :1.3 /org/gtk/gvfs/exec_spaw/1
apache 11518 1450 1450 1450 0 09:40 ? 00:00:00 /usr/sbin/httpd -DFOREGROUND
apache 11519 1450 1450 1450 0 09:40 ? 00:00:00 /usr/sbin/httpd -DFOREGROUND
apache 11520 1450 1450 1450 0 09:40 ? 00:00:00 /usr/sbin/httpd -DFOREGROUND
apache 11521 1450 1450 1450 0 09:40 ? 00:00:00 /usr/sbin/httpd -DFOREGROUND
apache 11522 1450 1450 1450 0 09:40 ? 00:00:00 /usr/sbin/httpd -DFOREGROUND
Assuming 1234 is PID and you want to know its associated PPID, PGID, SID & CMD
Tested on CentOS/RedHat 6.x & 7.x