The repository 'http://ppa.launchpad.net/dirk-computer42/c42-backport/ubuntu eoan Release' does not have a Release file
65
What can I do if a repository/PPA does not have a Release file?
743
How do I enable the "Universe" repository?
11909
404 error with apt-get update, Don't have any PPA's
105744
How to install and setup graylog-server and graylog-web on Ubuntu from repository?
121470
How to install 'add-apt-repository' using the terminal?
64509
Can't update from official repositories [Error 409]
96391
dpkg exit with error parsing file `/var/lib/dpkg/status`, what to do?
12968
What should I do when the GETDEB repository is down?
21323
Where can I download the latest release of Ubuntu?
20472
How do I enable the "partner" repository?
66285
Package repository down, how to relocate?
139458
How to download packages from a command-line given repository?
43425
failure to load repository information
154815
How do I add a repository from behind a proxy?
34277
how to package my git repo and publish to my launchpad ppa
15021
How to create a local APT repository?
93942
How to fix "Failed to download repository information" error while updating?