55

I run this command and got result this but not able to understand the result which node instance should i kill

 ps ax | grep node


23308 pts/3    S+     0:00 sudo node index.js
23310 pts/3    Sl+    0:00 node index.js
23568 pts/1    T      0:00 sudo node index.js
23824 pts/4    S+     0:00 sudo node index.js
23826 pts/4    Sl+    0:00 node index.js
24202 pts/5    R+     0:00 grep --color=auto node

and what S+ Sl+ T, R + Means .?

1 Answer 1

75

These are process STATE codes - from the man page

PROCESS STATE CODES
       Here are the different values that the s, stat and state output
       specifiers (header "STAT" or "S") will display to describe the state of
       a process.
       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.

       For BSD formats and when the stat keyword is used, additional
       characters may be displayed:
       <    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
2
  • 1
    So what is the diff between S+ and S1+ ?
    – Antarus
    Jan 20, 2014 at 12:45
  • 1
    @Antarus I believe its Sl+ and not S1+. Meaning its in interruptible sleep, foreground process group and multi-threaded. Jan 28, 2015 at 12:52

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