刚买了个香港的 vps 系统是 debian 8.2 就是更新不了源。

root@cloud:~# apt-get update

Err http://mirrors.163.com jessie InRelease

Err http://mirrors.163.com jessie/updates InRelease

Err http://mirrors.163.com jessie-proposed-updates InRelease

Err http://mirrors.163.com jessie-updates InRelease

Err http://security.debian.org jessie/updates InRelease

Err http://mirrors.163.com jessie Release.gpg
Could not resolve 'mirrors.163.com'
Err http://mirrors.163.com jessie/updates Release.gpg
Could not resolve 'mirrors.163.com'
Err http://mirrors.163.com jessie-proposed-updates Release.gpg
Could not resolve 'mirrors.163.com'
Err http://security.debian.org jessie/updates Release.gpg
Could not resolve 'security.debian.org'
Err http://mirrors.163.com jessie-updates Release.gpg
Could not resolve 'mirrors.163.com'
Reading package lists... Done
W: Failed to fetch http://mirrors.163.com/debian/dists/jessie/InRelease

W: Failed to fetch http://mirrors.163.com/debian-security/dists/jessie/updates/InRelease

W: Failed to fetch http://security.debian.org/dists/jessie/updates/InRelease

W: Failed to fetch http://mirrors.163.com/debian/dists/jessie-proposed-updates/InRelease

W: Failed to fetch http://mirrors.163.com/debian/dists/jessie-updates/InRelease

W: Failed to fetch http://mirrors.163.com/debian/dists/jessie/Release.gpg Could not resolve 'mirrors.163.com'

W: Failed to fetch http://mirrors.163.com/debian-security/dists/jessie/updates/Release.gpg Could not resolve 'mirrors.163.com'

W: Failed to fetch http://mirrors.163.com/debian/dists/jessie-proposed-updates/Release.gpg Could not resolve 'mirrors.163.com'

W: Failed to fetch http://mirrors.163.com/debian/dists/jessie-updates/Release.gpg Could not resolve 'mirrors.163.com'

W: Failed to fetch http://security.debian.org/dists/jessie/updates/Release.gpg Could not resolve 'security.debian.org'

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