I accidentally switched from Ubuntu Desktop 22.04 to Ubuntu Server 22.04. Typing one command without realizing understanding it, I tried to switch to Ubuntu desktop by installing tasksel, but I couldn't update apt.
Ubuntu server image:
The error that i face installing tasksel:
This is my terminal history after my laptop screen became red.
Assuming you want to get back to ubuntu desktop, enter the following command and reboot.
sudo apt install ubuntu-desktop^
To switch from Ubuntu Server to Ubuntu Desktop I had to install the ubuntu-desktop package.
That was not acceptable from my repositories.
This was the repositories problem. I added some released life repositories to:
/etc/apt/sources.list
All the links were like:
http://mr.old-releases.ubuntu.com/ubuntu
This resulted in the error :
mr.old-releases.ubuntu.com could not be resolved
I changed mr.old-releases to archive so that the link became like this:
http://archive.ubuntu.com/ubuntu
Then I updated apt:
sudo apt update
Then I installed the ubuntu-desktop package:
sudo apt install ubuntu-desktop