Error apt-get update on ubuntu 14.10 [duplicate]

i get an error when i update my ubuntu 14.10

this is an error :

Err http://ppa.launchpad.net utopic/main amd64 Packages                        
  404  Not Found
Err http://ppa.launchpad.net utopic/main i386 Packages                         
  404  Not Found
Ign http://kambing.ui.ac.id trusty/universe Translation-en_US                  
Fetched 22,6 MB in 4min 12s (89,5 kB/s)                                        
W: Failed to fetch http://ppa.launchpad.net/tualatrix/ppa/ubuntu/dists/utopic/main/binary-amd64/Packages  404  Not Found

W: Failed to fetch http://ppa.launchpad.net/tualatrix/ppa/ubuntu/dists/utopic/main/binary-i386/Packages  404  Not Found

E: Some index files failed to download. They have been ignored, or old ones used instead.

what should i do fix that error ?

Solution 1:

I also have (and had) many of these same problems. When you upgrade to a new distribution or install the latest one, not all developers have produced a working application for that version. APT automagically looks for the version name folder on the PPA source in your Software Sources.

In your case, 14.04 and 14.10 are similar enough that applications are likely to work on either one. (I've tested myself, they are plenty similar.)

To make this source update from 14.04 (Trusty) you can just open your Software & Updates application, switch tabs to Other Software, and look for the checked entry containing ppa.launchpad.net/tualatrix/ppa/ubuntu/dists/utopic/main.

Once you find it, you can select it, edit it, and change the Distribution field to "trusty". (no quotations) To finish up just run sudo apt-get update again.

I recommend checking back with the developer's page to see if they have updated their software to 14.10, if so, just go back into the Software Sources and set the distribution back to "utopic".