Errors that occur when tossing apt sources

When tossing the Ubuntu source, replace the new source, and

sudo apt-get update

After the error:

W:unknown multi-arch type ' no ' for package ' compiz-core ' w:unknown multi-arch type ' no ' for package ' compiz-gnome ' w:unkn Own Multi-arch type ' no ' for package ' compiz-core ' w:unknown multi-arch type ' no ' for package ' compiz-gnome ' w:you May wan T to run Apt-get update to correct these problems

This error will be reported when the software is loaded later. Sometimes with a previous error cups-daemon that connected to the newspaper (see: Http://www.cnblogs.com/anpengapple/p/5098960.html, last time is two pieces, let me completely puzzled). Fortunately, this is a separate day. Baidu is a circle of all English pages. Found a: https://answers.launchpad.net/ubuntu/+question/263324 the comments below are useful, but I can read the wood. Well, the feeling, presumably, is that the substitution of the source apt itself is confusing. It would be nice to help him clear up the idea.

sudo apt-get install-f apt

After that, it's normal.

If it doesn't work, you come to me. I won't, anyway.

Errors that occur when tossing apt sources