Clearsigned file error when attempting to update packages
When I run apt update I get the following error:
E: Clearsigned file '/var/lib/apt/lists/gb.archive.ubuntu.com_ubuntu_dists_focal-updates_InRelease' contains unsigned lines.
E: The package lists or status file could not be parsed or opened.
Could you advise on how I can resolve this please?
Solution 1:
Remove problematic lists by
sudo rm -r /var/lib/apt/lists/*
and then retry with
sudo apt update