Errors updating zesty packages - apt update/upgrade
Solution 1:
As described in release notes. Zesty will be supported for 9 months until January 2018. Therefore you can use old-releases
site, to install zesty packages.
You can use following sources list entries:
deb http://old-releases.ubuntu.com/ubuntu/ zesty main restricted universe multiverse
deb http://old-releases.ubuntu.com/ubuntu/ zesty-updates main restricted universe multiverse
deb http://old-releases.ubuntu.com/ubuntu/ zesty-security main restricted universe multiverse
deb http://old-releases.ubuntu.com/ubuntu/ zesty-proposed main restricted universe multiverse
deb http://old-releases.ubuntu.com/ubuntu/ zesty-backports main restricted universe multiverse
# this repo is disabled!
#deb http://archive.canonical.com/ubuntu zesty partner
deb-src http://old-releases.ubuntu.com/ubuntu/ zesty main restricted universe multiverse
deb-src http://old-releases.ubuntu.com/ubuntu/ zesty-updates main restricted universe multiverse
deb-src http://old-releases.ubuntu.com/ubuntu/ zesty-security main restricted universe multiverse
It can be successfully retrieved by apt without any problems.