先备份
sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak
编辑上面的文件,可以用vim工具,这里我有图形界面,所以用gedit
sudo gedit /etc/apt/sources.list
把下面的内容替换文件里内容,保存
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-updates main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-updates main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-backports main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-backports main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-security main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-security main restricted universe multiverse
sudo apt-get update
sudo apt-get upgrade
转自:https://blog.youkuaiyun.com/m1993zhao/article/details/134544478
本文介绍了如何通过备份并编辑/etc/apt/sources.list文件,将软件源更改为清华大学镜像,然后执行apt-getupdate和apt-getupgrade命令来更新和升级Ubuntu系统的详细过程。
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