debian更新慢,更换为国内源
vi /etc/apt/sources.list
阿里云

登录后复制
deb http://mirrors.aliyun.com/debian/ buster main
deb-src http://mirrors.aliyun.com/debian/ buster main
deb http://mirrors.aliyun.com/debian-security/ buster/updates main
deb-src http://mirrors.aliyun.com/debian-security/ buster/updates main
deb http://mirrors.aliyun.com/debian/ buster-updates main
deb-src http://mirrors.aliyun.com/debian/ buster-updates main

163

deb http://mirrors.163.com/debian/ buster main
deb-src http://mirrors.163.com/debian/ buster main
deb http://mirrors.163.com/debian-security/ buster/updates main
deb-src http://mirrors.163.com/debian-security/ buster/updates main
deb http://mirrors.163.com/debian/ buster-updates main
deb-src http://mirrors.163.com/debian/ buster-updates main

清华

deb http://mirrors.ustc.edu.cn/debian/ buster main
deb-src http://mirrors.ustc.edu.cn/debian/ buster main
deb http://mirrors.ustc.edu.cn/debian-security/ buster/updates main
deb-src http://mirrors.ustc.edu.cn/debian-security/ buster/updates main
deb http://mirrors.ustc.edu.cn/debian/ buster-updates main
deb-src http://mirrors.ustc.edu.cn/debian/ buster-updates main
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