pandya@pandya-desktop:~$ gnome-session-quit

root@pandya-desktop:/home/pandya# gnome-session-quit

** (gnome-session-quit:3168): WARNING **: Failed to call logout: The name org.gnome.SessionManager was not provided by any .service files

root@pandya-desktop:/home/pandya# su pandya
pandya@pandya-desktop:~$ gnome-session-quit

** (gnome-session-quit:3269): WARNING **: Failed to call logout: The name org.gnome.SessionManager was not provided by any .service files

#! /bin/bash
....command to be executed.....
sudo -u pandya gnome-session-quit

sudo -E -u pandya gnome-session-quit

#!/bin/bash

apt-get install firefox
sudo -E -u pandya gnome-session-quit

sudo -E /path/to/script