Q. I’d like to find out if httpd / mysqld or sshd process is running or not under CentOS Linux server. How do I determine whether a process is running or not?
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A. You need to use following commands:
[a] ps – It report a snapshot of the current processes
[b] grep – Filter out process names
Find out if sshd is Process is Running or Not
Type the following command at shell prompt:
$ ps -ewwo pid,args | grep [s]sh
Output:
5341 /usr/sbin/sshd 5864 /usr/bin/ssh-agent x-session-manager 6289 ssh oldbox 7126 ssh admin@core.r1.vsnl.router
Where,
- ps : Command name
- -ewwo pid,args : -e option force to select all running processes. -o option is used to specify user-defined format. In our case we are forcing to display only program pid and its arguments. Finally -w option specifies wide output. Use this option twice for unlimited width.
- grep [s]sh : We are just filtering out sshd string
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U can also do that without using user defined format….
ps -eaf |grep [s]sh
easy to remember than that…
if you want to see whether a process is running on your environment or not just go to your terminal and type a command on CLI
(root@local-host)# ps -ef | grep process_name
Here ps -ef used for displaying of all running process
grep is used for searching purpose here grep process_name search the process
ps -ef will be input to grep process_name by using pipesymbol
Thanks for sharing this nice tut.