How to add repositories to your ubuntu

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Because of that default repositories don’t contain the right locations for most software packages that you’ll want to install, you need always to add a repository to your ubuntu installation, to be able to download and install packages.

How to add new repositories?

You will want to open up the /etc/apt/sources.list file, find and uncomment the following lines

Repositories on Ubuntu are the locations that you can download software from. As a general rule, the default repositories don’t contain the right locations for most software packages that you’ll want to install. You will want to open up the /etc/apt/sources.list file, find and uncomment the following lines

deb http://us.archive.ubuntu.com/ubuntu dapper universe main restricted universe
deb http://security.ubuntu.com/ubuntu dapper-security universe

Note that if you are using a different version than Dapper Drake (6.06), you will probably see a different name there, something like breezy or edgy.

Once you are done adding the repositories, you’ll need to run this command:

sudo apt-get update