Unable to update packages
8525
Error Updating: izx/askubuntu/ubuntu xenial Release' does not have a Release file
46424
Cannot update software center repositories
85009
`apt update` failed on Debian Linux
118754
Package dependencies cannot be resolved
121201
Why can't I update applications without upgrading the whole OS?
13107
How to install updates via command line?
110896
Package installation - Outdated repository
62476
E: Package '' has no installation candidate
118978
Not all updates can be installed: partial upgrade
16837
Unable to upgrade from 14.04 to 14.10 "Cannot Calculate Upgrades"
49149
How do I solve "Unable to fetch some archives, maybe run apt-get update or try with --fix-missing" error?
13054
Failing package manager?
140893
Error when using apt-get update
74763
Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution)
64509
Can't update from official repositories [Error 409]
19288
Update manager doesn't offer an upgrade to the new release
11909
404 error with apt-get update, Don't have any PPA's