what is the process number of a "running application" ?

[Gordon Messmer]

On 01/14/2015 09:32 AM, Angelo Moreschini wrote:
> http://community.linuxmint.com/tutorial/view/50
> ---
>
>  From the command line you can type: |"sudo xkill"

There's no reason to use sudo for xkill.  Root can't do anything with 
xkill that you, as the X session owner, cannot do.

xkill doesn't kill an application, it causes the X server to disconnect 
the client application.  Usually that will cause the application to 
exit, but if it's well and truly stuck, it may continue consuming memory 
and CPU resources in the background, in which case you'll still need to 
track it down and kill it.