I am getting this error:
W: There is no public key available for the following key IDs: 1397BC53640DB551 W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty/Release Unable to find expected entry 'universe/binary-amd64/Packages' in Release file (Wrong sources.list entry or malformed file)
/etc/apt/sources.list contains only this, after trying the available solutions:
deb http://archive.ubuntu.com/ubuntu trusty main universe restricted multiverse
Have tried following Unable to find expected entry 'restricted/binary-amd64/Packages' in Release file and other questions to no avail. How hard is it to fix this mess up?
Will an upgrade to version 16 have any chance of circumventing the issue? I am currently on version 14.04 LTS. Prior upgrades have been painful.