xprop
May 4, 2016 ยท View on GitHub
Get window info on a window:
xprop -name Krusader
xprop -id 0x2000001
Select window by clicking on it:
xprop
Keep examining the properties, and print if changes happen:
xprop -spy -name Krusader
Important properties:
_NET_WM_PID: PID of the window