Is there any package which shows PID of a window by clicking on it?
Answers:
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Method 1
Yes. Try xprop and you are looking for the value of _NET_WM_PID:
xprop _NET_WM_PID | cut -d' ' -f3
{click on window}
Method 2
xprop will return a window’s PID.
You can filter the verbose output using awk:
xprop | awk '/PID/ {print $3}'
Method 3
To complete those excellent answers, here is a little bash command to get the command (that I actually needed):
id=`xprop _NET_WM_PID | awk '/PID/ {print $3}'`; cat /proc/$id/comm
Example:
Lila ~ # id=`xprop _NET_WM_PID | awk '/PID/ {print $3}'`; cat /proc/$id/comm
gnome-terminal-
All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0