W:Failed to fetch http://archive.ubuntu.com/ubuntu/dists/precise-updates/Release Unable to find expected entry 'univers/source/Sources' in Release file (Wrong sources.list entry or malformed file)
, E:Some index files failed to download. They have been ignored, or old ones used instead.
答案1
It seems that you have a typo in your sources.list
Edit
/etc/apt/sources.list
Look for the entry with univers
add an "e" to the end. Should be universe