Ubuntu: Basics of software repositories
Ubuntu: Basics of software repositories
Ubuntu uses apt for package management. Apt stores a list of repositories or software channels in the file
/etc/apt/sources.list
This is important to note as if you want to add sources for software packages you are going to either edit this file or add a referenced source file in the same format.
As with anything that deals with your system’s configuration it is recommended you perform a backup. A simple file copy operation would suffice:
sudo cp /etc/apt/sources.list /etc/apt/sources.list.backup
a typical source.list file looks as follows:
## Note, this file is written by cloud-init on first boot of an instance
## modifications made here will not survive a re-bundle.
## if you wish to make changes you can:
## a.) add ‘apt_preserve_sources_list: true’ to /etc/cloud/cloud.cfg
## or do the same in user-data
## b.) add sources in /etc/apt/sources.list.d
## c.) make changes to template file /etc/cloud/templates/sources.list.tmpl
#
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://azure.archive.ubuntu.com/ubuntu/ saucy main
deb-src http://azure.archive.ubuntu.com/ubuntu/ saucy main
If you want to add an additional repository you can do it via the command line:
sudo add-apt-repository ppa:<repository-name>
This will result in a new file created under /etc/apt/sources.list.d/ where the .list files are included as part of the sources.list. This approach allows for enhanced ease when it comes to maintaining multiple ppa sources.
