To see every process on the system using standard syntax:

Code:

ps -e
ps -ef
ps -eF
ps -ely

To see every process on the system using BSD syntax:

Code:

ps ax
ps axu

To print a process tree:

Code:

ps -ejH
ps axjf

To get info about threads:

Code:

ps -eLf
ps axms

To get security info:

Code:

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:

Code:

ps -U root -u root u

To see every process with a user-defined format:

Code:

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 -eopid,tt,user,fname,tmout,f,wchan

Print only the process IDs of syslogd:

Code:

ps -C syslogd -o pid=

Print only the name of PID 42:

Code:

ps -p 42 -o comm=