我知道这之前已经涵盖过，但我似乎无法解决我的问题。这是我的输出。
jake@KUBIE-SERVER:~$ sudo apt-get update
Err http://us.archive.ubuntu.com precise InRelease
Err http://us.archive.ubuntu.com precise-updates InRelease
Err http://us.archive.ubuntu.com precise-backports InRelease
Err http://security.ubuntu.com precise-security InRelease
Err http://archive.canonical.com precise InRelease
Err http://ppa.launchpad.net precise InRelease
Err http://archive.canonical.com precise Release.gpg
Temporary failure resolving 'archive.canonical.com'
Err http://ppa.launchpad.net precise Release.gpg
Temporary failure resolving 'ppa.launchpad.net'
Err http://security.ubuntu.com precise-security Release.gpg
Temporary failure resolving 'security.ubuntu.com'
Err http://us.archive.ubuntu.com precise Release.gpg
Temporary failure resolving 'us.archive.ubuntu.com'
Err http://us.archive.ubuntu.com precise-updates Release.gpg
Temporary failure resolving 'us.archive.ubuntu.com'
Err http://us.archive.ubuntu.com precise-backports Release.gpg
Temporary failure resolving 'us.archive.ubuntu.com' …