If you check the
STAT column in above image you will see
Ss S S< SN and R+
What does this indicates ?
If yes,Then what is the significance of
'Ss S< SN and R+'?
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These are indeed the process states. Processes states that ps indicates are:
D Uninterruptible sleep (usually IO) R Running or runnable (on run queue) S Interruptible sleep (waiting for an event to complete) T Stopped, either by a job control signal or because it is being traced. W paging (not valid since the 2.6.xx kernel) X dead (should never be seen) Z Defunct ("zombie") process, terminated but not reaped by its parent.
and the additional characters are:
< high-priority (not nice to other users) N low-priority (nice to other users) L has pages locked into memory (for real-time and custom IO) s is a session leader l is multi-threaded (using CLONE_THREAD, like NPTL pthreads do) + is in the foreground process group
You could also find this all by looking in the man page for
ps, specifically the
PROCESS STATE CODES section.