How to check if a given PPA or repository is available
105208
How can I check if a PPA has packages for another Ubuntu version?
103118
Check if a node.js module is available
25705
Test if a package (or package option) is loaded
77601
How to find out the package download count from a PPA?
116869
Is it possible to know from apt if the package was installed explicitly or as a dependency of another package?
7639
check if Gutenberg is currently in use
3298
How do I resolve unmet dependencies after adding a PPA?
121912
How can I search for packages depending on a exact package?
64123
How to list packages from a ppa/source in command line?
65
What can I do if a repository/PPA does not have a Release file?
55857
How do I get a list of obsolete packages?
20472
How do I enable the "partner" repository?
6724
What tools do I need to use to report a bug in a developers PPA?
93030
dependency in ppa
40503
How can I check if automatic updates are enabled?
21842
How to host a repository in my own site like a PPA?
138121
How to see what will be updated from repository before issuing "svn update" command?