Linux系统中更换软件源

ubuntu

备份源

cp /etc/apt/source.list /etc/apt/source.list.bak

清空源

echo > /etc/apt/source.list

更新源

echo "deb http://us.archive.ubuntu.com/ubuntu/ bionic main restricted" >> /etc/apt/sources.list
echo "deb http://us.archive.ubuntu.com/ubuntu/ bionic-updates main restricted" >> /etc/apt/sources.list
echo "deb http://us.archive.ubuntu.com/ubuntu/ bionic universe" >> /etc/apt/sources.list
echo "deb http://us.archive.ubuntu.com/ubuntu/ bionic-updates universe" >> /etc/apt/sources.list
echo "deb http://us.archive.ubuntu.com/ubuntu/ bionic multiverse" >> /etc/apt/sources.list
echo "deb http://us.archive.ubuntu.com/ubuntu/ bionic-updates multiverse" >> /etc/apt/sources.list
echo "deb http://us.archive.ubuntu.com/ubuntu/ bionic-backports main restricted universe multiverse" >> /etc/apt/sources.list
echo "deb http://security.ubuntu.com/ubuntu bionic-security main restricted" >> /etc/apt/sources.list
echo "deb http://security.ubuntu.com/ubuntu bionic-security universe" >> /etc/apt/sources.list
echo "deb http://security.ubuntu.com/ubuntu bionic-security multiverse" >> /etc/apt/sources.list
echo "deb http://mirrors.ustc.edu.cn/ubuntu/ xenial main restricted universe multiverse" >> /etc/apt/sources.list
echo "deb http://mirrors.ustc.edu.cn/ubuntu/ xenial-security main restricted universe multiverse" >> /etc/apt/sources.list
echo "deb http://mirrors.ustc.edu.cn/ubuntu/ xenial-updates main restricted universe multiverse" >> /etc/apt/sources.list
echo "deb http://mirrors.ustc.edu.cn/ubuntu/ xenial-proposed main restricted universe multiverse" >> /etc/apt/sources.list
echo "deb http://mirrors.ustc.edu.cn/ubuntu/ xenial-backports main restricted universe multiverse" >> /etc/apt/sources.list
echo "deb-src http://mirrors.ustc.edu.cn/ubuntu/ xenial main restricted universe multiverse" >> /etc/apt/sources.list
echo "deb-src http://mirrors.ustc.edu.cn/ubuntu/ xenial-security main restricted universe multiverse" >> /etc/apt/sources.list
echo "deb-src http://mirrors.ustc.edu.cn/ubuntu/ xenial-updates main restricted universe multiverse" >> /etc/apt/sources.list
echo "deb-src http://mirrors.ustc.edu.cn/ubuntu/ xenial-proposed main restricted universe multiverse" >> /etc/apt/sources.list
echo "deb-src http://mirrors.ustc.edu.cn/ubuntu/ xenial-backports main restricted universe multiverse" >> /etc/apt/sources.list

软件源更新

apt-get update

软件更新

apt-get upgrade

软件包自动清除

apt-get autoremove

异常：

update出现

GPG error: The following signatures couldn't be verified because ······

解决方案

gpg --keyserver keyserver.ubuntu.com --recv 5523BAEEB01FA116 //(这个公钥根据提示来写的)
gpg --export --armor 5523BAEEB01FA116 | sudo apt-key add -

centos

备份一下原来yum源文件

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo_bak

下载阿里云yum源文件

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

清理缓存

yum makecache

查看

yum repolist

更新

yum -y update