Learn N Try

For all Lean Enthusiast

PS Command

  • ps is the command in unix to find the details about processed running.
  • To see every process on the system using standard syntax:

ps -e

ps -ef

ps -eF

ps -ely

  • To see every process on the system using BSD syntax:

ps ax

ps axu

  • To print a process tree:

ps -ejH

ps axjf

  • To get info about threads:

ps -eLf

ps axms


  • To get security info:

ps -eo euser,ruser,suser,fuser,f,comm,label

ps axZ

ps -eM

  • To see every process running as root (real & effective ID) in user format:

ps -U root -u root u

  • To see every process with a user-defined format:

ps -eo pid,tid,class,rtprio,ni,pri,psr,pcpu,stat,wchan:14,comm

ps axo stat,euid,ruid,tty,tpgid,sess,pgrp,ppid,pid,pcpu,comm

ps -Ao pid,tt,user,fname,tmout,f,wchan


  • Print only the process IDs of syslogd:

ps -C syslogd -o pid=


  • Print only the name of PID 42:

ps -q 42 -o comm=


  • To view complete process tree of user

pstree <user>