一键切换debian 11的源

很多的VPS或者独立服务器默认提供的系统模板有时候乱来的，更新的时候源太慢，我们需要修改一下，这里收集了几个不错的，国内外都能用得着，一键搞定！

备份现有的源

mv /etc/apt/sources.list /etc/apt/sources.list.old


替换为官方默认的源：
cat > /etc/apt/sources.list << EOF
deb http://deb.debian.org/debian/ bullseye main contrib non-free
deb-src http://deb.debian.org/debian/ bullseye main contrib non-free

deb http://deb.debian.org/debian-security/ bullseye-security main contrib non-free
deb-src http://deb.debian.org/debian-security/ bullseye-security main contrib non-free
EOF
替换为linode的源：
cat > /etc/apt/sources.list << EOF
deb http://mirrors.linode.com/debian/ bullseye main contrib non-free
deb-src http://mirrors.linode.com/debian/ bullseye main contrib non-free

deb http://mirrors.linode.com/debian-security/ bullseye-security main contrib non-free
deb-src http://mirrors.linode.com/debian-security/ bullseye-security main contrib non-free
EOF


如果要使用国内源，推荐华为，只需要修改上面那些里面的域名为https://mirrors.huaweicloud.com即可！