Plaease help on how can i completely remove gnome3 from ubuntu 20.04 without affectind KDE Plasma because i have limited space. Thank you. I have only found maretials for removing KDE and none for gnome. here https://askubuntu.com/questions/1374638/how-do-i-completely-remove-gnome-from-ubuntu-desktop-after-installing-kde#:~:text=Your%20best%20path%20is%20to,what%20you're%20asking%20for.
The safest way that you should start with would be installing
kubuntu-desktop metapackage, removing
ubuntu-desktop metapackage and performing
sudo apt autoremove --purge after reading through packages that will be removed and verifying that you don't need any of them.
However if you have limited space you can remove more packages that you don't need and that action may remove
kubuntu-desktop in the process. At that point you need to mark some packages as installed manually to avoid removing them when you perform
autoremove. You can do it either with apt-mark or just by performing
apt install packagename.
Another, less safe way would be finding a package that all GNOME software depends on and removing it so that it will take all the packages that depend on it with it.
libgnome-desktop-3-* looks like a candidate package for that. Be careful around
libgtk* packages though as it may be too excessive,
kde-config-gtk-style-preview depend on it.
Before starting you can backup lists of installed packages with
apt-mark showmanual and