Cydia - Add sources through command line

I am able to SSH into my iPhone and update the file /var/mobile/Library/Caches/com.saurik.Cydia/sources.list with the number of repos, but the file gets reverted as soon as I try to update the repos through the Cydia app. Is there a way to download/update the Cydia sources through command link. I am basically looking to add multiple sources easily into Cydia.