Switching from GNOME to Xfce on Debian
Hi! This Guide shows you Step-by-step How Easy Switching from GNOME/Gnome3 to Xfce Desktop on Debian 7-Wheezy/8-Jessie/9-Stretch/10-Buster/11-Bullseye/12-Bookworm GNU/Linux Desktops.
To Login into the Xfce Desktop we will Install and Make Use of the slim Display Manager.
Finally, the post’s Content is Expressly Reduced to Give Focus to the Essentials Instructions and Commands.

Installing the Xfce Desktop.
su
If Got “User is Not in Sudoers file” then see: How to Enable sudo
aptitude install xfce4
Installing and Switching to Slim Display Manager.
aptitude install slim
Choose the slim Display Manager.
Disabling the gdm/gdm3 Display Managers.
aptitude install rcconf
rcconf
Disable the gnome or gnome3 Display Managers.
Setup Slim for Running a Desktop on Debian:
Debian Slim Setup How-toSetUp Xfce for Starting at Boot.
su <username>
nano ~/.xinitrc
Inserts:
exec startxfce4
Rebooting into the Debian Xfce Desktop :)
reboot
Press F1 to Switch from GNOME to Xfce & Viceversa.
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