Adding a new APT repository to a Debian-based distro can be done running the following two commands:
~$ wget -O - <url_key> | sudo apt-key add -
~$ sudo wget -O /etc/apt/sources.list.d/<source>.list <url_source_list>where:
– <url_key> is the URL of the key
– <source> is the name of the source
– <url_source_list> is the URL of the remote source list file
The first command downloads the corresponding APT key, while the second one adds the repository into a new source list file.
Now you can update APT executing the usual command:
~$ sudo apt-get update