I have a Lucid Server (10.04) set up and I would like to change the mirror from US (or any other country) to the Main Ubuntu Mirror.
For example my two first entries in sources.list are:
deb http://us.archive.ubuntu.com/ubuntu/ lucid main restricted
deb-src http://us.archive.ubuntu.com/ubuntu/ lucid main restricted
In a Desktop environment I would select the main mirror like this:
But how do I do that from the terminal as I don't have a graphical environment installed!