Я только что установил Macbuntu, и я не могу установить любой пакет, и я получаю сообщение об ошибке
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package mricron
Я пробовал sudo apt-get update
`и я получаю ошибку
W: Failed to fetch http://se.archive.ubuntu.com/ubuntu/dists/natty-updates/restricted/binary-amd64/Packages 404 Not Found [IP: 130.239.18.173 80]
W: Failed to fetch http://se.archive.ubuntu.com/ubuntu/dists/natty-updates/universe/binary-amd64/Packages 404 Not Found [IP: 130.239.18.173 80]
W: Failed to fetch http://se.archive.ubuntu.com/ubuntu/dists/natty-updates/multiverse/binary-amd64/Packages 404 Not Found [IP: 130.239.18.173 80]
W: Failed to fetch http://se.archive.ubuntu.com/ubuntu/dists/natty-backports/main/binary-amd64/Packages 404 Not Found [IP: 130.239.18.173 80]
W: Failed to fetch http://se.archive.ubuntu.com/ubuntu/dists/natty-backports/restricted/binary-amd64/Packages 404 Not Found [IP: 130.239.18.173 80]
W: Failed to fetch http://se.archive.ubuntu.com/ubuntu/dists/natty-backports/universe/binary-amd64/Packages 404 Not Found [IP: 130.239.18.173 80]
W: Failed to fetch http://se.archive.ubuntu.com/ubuntu/dists/natty-backports/multiverse/binary-amd64/Packages 404 Not Found [IP: 130.239.18.173 80]
E: Some index files failed to download. They have been ignored, or old ones used instead.
Как я могу это исправить. заранее спасибо