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Ubuntu : Adding a new repository (PPA)

ubuntu

To add a repository ppa:
sudo add-apt-repository ppa:user/ppa-name
sudo apt-get update
Sometimes adding a repository may result in error related to missing key. Then copy that key and run following command

sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com KEY
Do this for each of the missing keys.
Now re-run the above two commands.

If you are under proxy network or seen a error like
Cannot add PPA: 'ppa:user/ppa-name'.
Please check that the PPA name or format is correct.
and if you are sure that the PPA is working, the try
sudo -E add-apt-repository ppa:user/ppa-name
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