[zillur@genomics zillur]$ ls /usr/bin/*session
/usr/bin/gnome-session  /usr/bin/gnome-session-custom-session
[zillur@genomics zillur]$ pgrep -l "gnome|kde|mate|cinnamon"
121 kdevtmpfs
1204 gnome-keyring-d
1349 gnome-session
1643 gnome-settings-
1715 gnome-shell
1747 gnome-shell-cal
1942 gnome-software
3762 gnome-keyring-d
3798 gnome-session
4002 gnome-settings-
4082 gnome-shell
4102 gnome-shell-cal
4273 gnome-software
4627 gnome-terminal-
4631 gnome-pty-helpe
5452 gnome-session
5500 gnome-settings-
5534 gnome-shell
12846 kdeinit4
12850 kded4
[zillur@genomics zillur]$ ps -A | egrep -i "gnome|kde|mate|cinnamon"
  121 ?        00:00:00 kdevtmpfs
 1204 ?        00:00:00 gnome-keyring-d
 1349 ?        00:00:01 gnome-session
 1643 ?        00:00:54 gnome-settings-
 1715 ?        00:00:07 gnome-shell
 1747 ?        00:00:00 gnome-shell-cal
 1942 ?        00:00:16 gnome-software
 3762 ?        00:00:00 gnome-keyring-d
 3798 ?        00:00:07 gnome-session
 4002 ?        00:05:28 gnome-settings-
 4082 ?        01:39:21 gnome-shell
 4102 ?        00:00:00 gnome-shell-cal
 4273 ?        00:01:29 gnome-software
 4627 ?        00:04:00 gnome-terminal-
 4631 ?        00:00:00 gnome-pty-helpe
 5452 ?        00:00:01 gnome-session
 5500 ?        00:00:42 gnome-settings-
 5534 ?        00:00:02 gnome-shell
12846 ?        00:00:00 kdeinit4
12850 ?        00:00:00 kded4