Ubuntu 22.04 LTS 五年长期支持版本，直到2027年4月
1- 备份原配置
sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak
2- 清华大学镜像
复制以下命令即可一键切换到清华大学ubuntu 22.04镜像：
sudo bash -c "cat << EOF > /etc/apt/sources.list && apt update deb https://mirrors.tuna./ubuntu/ jammy main restricted universe multiverse# deb-src https://mirrors.tuna./ubuntu/ jammy main restricted universe multiversedeb https://mirrors.tuna./ubuntu/ jammy-updates main restricted universe multiverse# deb-src https://mirrors.tuna./ubuntu/ jammy-updates main restricted universe multiversedeb https://mirrors.tuna./ubuntu/ jammy-backports main restricted universe multiverse# deb-src https://mirrors.tuna./ubuntu/ jammy-backports main restricted universe multiversedeb https://mirrors.tuna./ubuntu/ jammy-security main restricted universe multiverse# deb-src https://mirrors.tuna./ubuntu/ jammy-security main restricted universe multiverseEOF"
引用：
ubuntu 22.04国内镜像阿里云/163源/清华大学/中科大 | myfreax
/ubuntu-22-04geng-gai-jing-xiang-ruan-jian-yuan/
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