My scrapbook about anything which I learned or want to remember, Sometime about tech tips, thoughts and rambling. If you find anything useful don't forget to give thumbs-up :)

Breaking

Tuesday, December 8, 2015

ps command #2 - Advance


ps command #1

Usually, when we are monitoring process, we are targeting something which can impact our server performance or some specific process. For doing so we grep the ps output -

This is how we call list all http processes -
$ ps aux | grep http
atul      7585  0.0  0.0 177676   592 ?        S    Dec06   0:00 /usr/libexec/gvfsd-http --spawner :1.7 /org/gtk/gvfs/exec_spaw/2
root     28848  0.0  0.0   2700   168 pts/0    D+   02:49   0:00 grep http

you can filter ps command output by any keyword as above.

There are some ps options which can give you a customized output -

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

Print only the process IDs of process syslogd:
$ ps -C syslogd -o pid=
 #ps -C <process_name> -o pid=


Print only the name of PID 42:
$ ps -p 42 -o comm=
  #ps -p <process_id> -o comm=






Like the below page to get update  
https://www.facebook.com/datastage4you
https://twitter.com/datagenx
https://plus.google.com/+AtulSingh0/posts
https://groups.google.com/forum/#!forum/datagenx

No comments:

Post a Comment

Disclaimer

The postings on this site are my own and don't necessarily represent IBM's or other companies positions, strategies or opinions. All content provided on this blog is for informational purposes and knowledge sharing only.
The owner of this blog makes no representations as to the accuracy or completeness of any information on this site or found by following any link on this site. The owner will not be liable for any errors or omissions in this information nor for the availability of this information. The owner will not be liable for any losses, injuries, or damages from the display or use of his information.