Failed to fetch ppa - cannot update anymore
6809
How do I fix the GPG error "NO_PUBKEY"?
339
How to resolve "Failed to download repository information"?
150182
Ubuntu 14.04: problems upgrading php to 5.6 using ppa:ondrej
51598
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
56150
Can't upgrade/update ubuntu 18.04 as apt/dpkg error is showing up
21184
Running "sudo apt-get update" returns connection errors
1833
14.04 Cleanly upgrade to ppa:ondrej/php from ppa:ondrej/php5-5.6
5316
Update from 14.04 to 16.04 failed with GPG error
12368
A "failed to fetch" error occurs when apt-get update is run. How do I fix this?
10633
software updater failed to download repository information
64509
Can't update from official repositories [Error 409]
150033
E: Sub-process /usr/bin/dpkg returned an error code (1) for almost all updates
158683
apt-get update failed because certificate verification failed because handshake failed on nodesource
48418
W: GPG error: http://ppa.launchpad.net precise Release: The following signatures couldn't be verified because the public key is not available:
139120
Intel Graphis card not updating. Problem with ppa?
47843
Upgraded to Chrome 61.0.3163 via ppa on Ubuntu 16.04 but it won't launch because NSS out of date
8353
How do I access my software updater if it doesn't display anywhere?