apt_foo.md

Sundry Apt Foo

Remove PPAs

$ sudo add-apt-repository --remove ppa:whatever/ppa

Or, install ppa-purge:

$ sudo apt-get install ppa-purge

Remove the PPA, downgrading gracefully packages it provided to packages provided by official repositories:

$ sudo ppa-purge ppa:whatever/ppa

You can also remove PPAs by deleting the .list files from /etc/apt/sources.list.d directory.

Remove Old Kernels

Old kernels pile up and waste space.

Remove unneeded packages, including old kernels:

$ sudo apt autoremove

Or, use the purge-old-kernels command in Ubuntu:

$ sudo apt-get install bikeshed
Or
$ sudo apt-get install byobu

$ sudo purge-old-kernels