debian9、10快速更换阿里云源和其他的源

vi /etc/apt/sources.list

deb http://mirrors.aliyun.com/debian stretch main contrib non-free
deb-src http://mirrors.aliyun.com/debian stretch main contrib non-free
deb http://mirrors.aliyun.com/debian stretch-updates main contrib non-free
deb-src http://mirrors.aliyun.com/debian stretch-updates main contrib non-free
deb http://mirrors.aliyun.com/debian-security stretch/updates main contrib non-free
deb-src http://mirrors.aliyun.com/debian-security stretch/updates main contrib non-free

# deb cdrom:[Debian GNU/Linux 10.0.0 _Buster_ - Official amd64 NETINST 20190706-10:23]/ buster main

#deb cdrom:[Debian GNU/Linux 10.0.0 _Buster_ - Official amd64 NETINST 20190706-10:23]/ buster main

deb http://mirror.clayer.net/debian/ buster main
deb-src http://mirror.clayer.net/debian/ buster main

deb http://security.debian.org/debian-security buster/updates main
deb-src http://security.debian.org/debian-security buster/updates main

# buster-updates, previously known as 'volatile'
deb http://mirror.clayer.net/debian/ buster-updates main
deb-src http://mirror.clayer.net/debian/ buster-updates main

apt-get update

apt-get upgrade