reworded sentence mentioning pbs

docs.it4i/general/accessing-the-clusters/graphical-user-interface/x-window-system.md

@@ -142,8 +142,8 @@ On older systems where Xephyr is not available, you may also try Xnest instead o
 xinit /usr/bin/ssh -XT -i .ssh/path_to_your_key yourname@cluster-namen.it4i.cz gnome-session -- :1 vt12
 ```
 
-However, this method does not seem to work with recent Linux distributions and you will need to manually source
-/etc/profile to properly set environment variables for PBS.
+If the method does not seem to work with your Linux distribution,
+try manually sourcing `/etc/profile` to properly set environment variables for the Workload Manager.
 
 ### Gnome on Windows