Post here problems (and solutions to problems) faced by HEP users when using Ubuntu and other Debian based distriutions. Remember that there are already well reputed Linux Communities to help you learn Linux, such as:
- LinuxQuestions.org
- StackOverflow
- unix.stackexchange.com
- Reddit (r/linux)
- Linux Mint Forum
- Arch Linux Wiki
…and in particular for Ubuntu related problems: