Why is extras.ubuntu.com down?
1520
How to install software or upgrade from an old unsupported release?
45648
How to get more information about "Error loading extension"?
148380
Chat is down. Where can I find when it'll be back up?
93942
How to fix "Failed to download repository information" error while updating?
12773
The requested package is unknown
125223
is there a reason the Getdeb Repo is always down
51513
More 404s with missing slashes
122274
Release file for http://archive.ubuntu.com/ubuntu/dists/bionic-updates/InRelease is not valid yet
52190
How and when is old-releases.ubuntu.com updated?
75879
How do I get add-apt-repository to work through a proxy?
3303
SEO (or other) problems with a 404?
106026
Why can't I connect to Ubuntu One?
125851
How do I diagnose not being able to reach a specific website as an end user?
127008
Why did Ubuntu stop free shipping of its CDs?
63070
Why is my attempt at downloading Big Sur failing?
61996
Why my website giving "The site ahead contains harmful programs" error?
11909
404 error with apt-get update, Don't have any PPA's