Question #703821 “how to reinstall network-manager from Ubuntu I…” : Questions : network-manager package : Ubuntu

Twice in a year the installed network-manager stopped to work in my Ubuntu 22.04.1 LTS leaving me without internet connection. I wonder if there is a way to prevent this to happen. My question is: Can I reinstall network-manager from the Ubuntu ISO file that I kept since the installation?, If that is possible, what will be the Terminal procedure without internet connection available to do it? Once I get the internet access again I will be able to update it.

Thank for your support.

More details: I tried almost all procedures recommended to regain access to the internet… almost all of them, required an active connection, or a “friend” computer connected, what I am using now. The procedures that I could follow without internet did not work for me.
The symptoms: Network manager in the settings menu is showing only manual setting HTTP proxy 8080, nothing else; in Terminal, $ nmtui shows my connections en edit mode, but not to connect; the same happens in $ nmcli con show.

To have a procedure to reinstall from Ubuntu ISO will be very helpful to regain access to the internet. If more details needed just ask.