The meaning in the status column displayed by PS aux command

D Non interruptible Uninterruptible sleep (usually IO)

R Running , Or processes in the queue

S In a dormant state

T To stop or be tracked

Z Zombie process

W Enter memory swap （ From the kernel 2.6 It doesn't work at first ）

X Dead process

 

< High priority

N Low priority

L Some pages are locked into memory

s Include subprocesses

+ Process groups in the background ;

l Multithreading , Clone thread multi-threaded (using CLONE_THREAD, like NPTL pthreads do)