Package Repository Management on Ubuntu and Mint

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• Add repository: 'sudo apt-add-repository ppa:kernel-ppa/ppa`

• List all repositories: ls /etc/apt/sources.list.d

• Remove repository: sudo apt-add-repository --remove ppa:kernel-ppa/ppa. If you can't get the PPA name, do it manually with sudo rm /etc/apt/sources.list.d/theppa.list.

For desktop version, say Ubuntu 14.04 Unity, you can also manage PPAs in GUI:

System Settings -> Software & Updates -> Other Software

You can see all PPAs are listed here. When an item is unchecked, say "http://repo.mongodb.org/apt/ubuntu", under the hood the line "deb http://..." in /etc/apt/sources.list.d/mongodb-org-3.0.list is commented out.

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