更新阿里云镜像源下载gcc工具
sudo cp /etc/apt/sources.list /etc/apt/sources.listbakvim/etc/apt/sources.list /etc/apt/sources.list将里面的内容替换成如下的阿里镜像源地址deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiversed
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sudo cp /etc/apt/sources.list /etc/apt/sources.listbak
vim /etc/apt/sources.list将里面的内容替换成如下的阿里镜像源地址
deb http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse
执行更新命令
sudo apt-get update
sudo apt upgrade下面就可以下载gcc工具了
sudo apt-get install gcc
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