Trying to upgrade to a new release version, having trouble with /etc/apt/sources.list
1520
How to install software or upgrade from an old unsupported release?
18622
How do I install a different Python version using apt-get?
35152
Dependency errors for python3 and many others when I run sudo apt-get upgrade
35146
Will apt-get dist-upgrade upgrade my system to newer version?
41519
What can I do if a package is not available on the newest version of Ubuntu (18.04) but is available on older versions?
132933
Is there a tool to update my PPA sources.list entries after upgrading?
90937
apt-get update errors
13399
Why can I no longer (un)install packages via apt-get after doing a partial dist-upgrade?
109338
How do I restore the sources.list file?
60351
How can I update to a newer version of Git using apt-get?
4853
Trouble downloading packages list due to a "Hash sum mismatch" error
120161
Ubuntu 19.04 problems install upgrades
24603
apt-get upgrade gives "403 forbidden" error
133
How can I fix a 404 Error when using a PPA or updating my package lists?
11039
Invalid filename extension in apt sources.list
2670
Why is "No new release found" when upgrading from a LTS to the next?
24858
How do remove "Ignoring file in directory /etc/apt/sources.list.d/ as it has an invalid filename extension?