I hadn't updated elementaryOS for a while.
My OSupdate has 29 components with update in the Appcenter.
If I am in the Appcenter and click on Update, the OS asks my password and then the update cancels itself, and I don't know why.
I thought, if I cannot update with the Appcenter, then I can update with Terminal. I tried following commands (from Update with terminal instead of AppCenter) :
sudo apt update : I then have in the Appcenter the following message : "Failed to fetch updates - This may have been caused by external, manually added software repositeries or a corrupted sources file." (see the image below)
sudo apt full-upgrade : E: dkpg was interrupted, you must manually run "sudo dkpg --configure -a" to resolve the problem
sudo apt-get update : in the Terminal I read Reading package list...done In the Appcenter I have the same error message as with sudo apt update
sudo apt-get dist-upgrade : same error message as with sudo apt full-upgrade
I just hope someone knows how to deal with this. Perhaps with another command text or if I could understand the error messages and what to do with them.
Anyway thanks to anyone trying to help.