How to report a bug of an unofficial package?
6724
What tools do I need to use to report a bug in a developers PPA?
12054
How do I deal with "unauthenticated sources" errors in the Software Center?
88531
Is there a tool/website to compare package status in different Linux distributions?
9896
How do I get and modify the source code of packages installed through apt-get?
4268
How to fix "Package is in a very bad inconsistent state" error?
37798
Fix half-installed package
16502
How can I know the dependencies of a certain package?
41054
How can I check the available version of a package in the repositories?
6665
How can I report bugs with or request features for the Stack Exchange mobile apps?
19749
How to debug an unmet dependencies problem?
151411
How can I know if a virtual package is "installed" on a Debian system?
5830
How to prevent updating of a specific package?
97257
What tools exist to report bugs
30828
How can I tell which package an executable came from?
66101
How to check which package created a user?
70138
How can I find out what modifications a program’s installer makes?
65
What can I do if a repository/PPA does not have a Release file?