I have this problem:
Err http://apt.vestacp.com quantal/vesta amd64 Packages
404 Not Found
Ign http://apt.vestacp.com quantal/vesta Translation-en_US
Ign http://apt.vestacp.com quantal/vesta Translation-en
Ign http://nginx.org quantal/nginx Translation-en_US
Ign http://nginx.org quantal/nginx Translation-en
W: Failed to fetch http://apt.vestacp.com/quantal/dists/quantal/vesta/binary-amd64/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package vesta
E: Unable to locate package vesta-nginx
E: Unable to locate package vesta-php
Error: apt-get install failed
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