Ubuntu修改apt-get源为国内镜像源的⽅法1、原⽂件备份
sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak
2、编辑源列表⽂件
sudo vim /etc/apt/sources.list
3、将原来的列表删除，添加如下内容（阿⾥镜像源）
deb mirrors.aliyun/ubuntu/ bionic main restricted universe multiverse
deb-src mirrors.aliyun/ubuntu/ bionic main restricted universe multiverse
deb mirrors.aliyun/ubuntu/ bionic-security main restricted universe multiverse
deb-src mirrors.aliyun/ubuntu/ bionic-security main restricted universe multiverse
deb mirrors.aliyun/ubuntu/ bionic-updates main restricted universe multiverse
deb-src mirrors.aliyun/ubuntu/ bionic-updates main restricted universe multiverse
deb mirrors.aliyun/ubuntu/ bionic-backports main restricted universe multiverse
deb-src mirrors.aliyun/ubuntu/ bionic-backports main restricted universe multivers
deb mirrors.aliyun/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src mirrors.aliyun/ubuntu/ bionic-proposed main restricted universe multiverse
4、运⾏ sudo apt-get update
ubuntu vim命令5、如果出现以下错误：
E: ⽆法获得锁 /var/lib/apt/lists/lock - open (11: 资源暂时不可⽤)
E: ⽆法对⽬录 /var/lib/apt/lists/ 加锁
是因为上⼀次更新源的时候⾮常规中断导致的，解决⽅法如下:
sudo rm /var/lib/apt/lists/lock

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