Linux Command Related with Process
Following tables most commonly used command(s) with process:
| For this purpose | Use this Command | Examples* |
| To see currently running process | ps | $ ps |
| To stop any process by PID i.e. to kill process | kill {PID} | $ kill 1012 |
| To stop processes by name i.e. to kill process | killall {Process-name} | $ killall httpd |
| To get information about all running process | ps -ag | $ ps -ag |
| To stop all process except your shell | kill 0 | $ kill 0 |
| For background processing (With &, use to put particular command and program in background) | linux-command & | $ ls / -R | wc -l & |
| To display the owner of the processes along with the processes | ps aux | $ ps aux |
| To see if a particular process is running or not. For this purpose you have to use ps command in combination with the grep command | ps ax | grep process-U-want-to see | For e.g. you want to see whether Apache web server process is running or not then give command $ ps ax | grep httpd |
| To see currently running processes and other information like memory and CPU usage with real time updates. | top See the output of top command. | $ top Note that to exit from top command press q. |
| To display a tree of processes | pstree | $ pstree |
* To run some of this command you need to be root or equivalnt user.
NOTE that you can only kill process which are created by yourself. A Administrator can almost kill 95-98% process. But some process can not be killed, such as VDU Process.