Have installed Ubuntu 18 that is stable enough so I don't want to change anything except installing additional applications from time to time. But all installation instructions look like this:
sudo apt update
sudo apt upgrade
sudo apt install <package-name>
That means all and every installed package will be upgraded to its latest avaliable version. I tried to disable system updates and to skip the first two of the above commands but it caused the problem apt-get install unexpectedly removed Firefox.
So the questions are:
- Is it possible to install a new application without updating and upgrading anything else?
- If a new package (in its latest version) cannot coexist with some existing out-of-date packages is it possible to install an older version of this package somehow?