linux源配置：ubuntu、centos

1、ubuntu源配置

1）先查电脑版本型号:

lsb_release -c

2）再编辑源更新，源要与上面型号对应
参考：https://midoq.github.io/2022/05/30/Ubuntu20-04%E6%9B%B4%E6%8D%A2%E5%9B%BD%E5%86%85%E9%95%9C%E5%83%8F%E6%BA%90/

/etc/apt/sources.list

3）更新源配置

apt update
apt upgrade

2、centos源配置

参考：
https://developer.aliyun.com/mirror/centos?spm=a2c6h.13651102.0.0.3e221b11iDH0bA

https://baijiahao.baidu.com/s?id=1748983525892204100&wfr=spider&for=pc

https://cloud.tencent.com/developer/article/2094265

1）下载

cd /etc/yum.repos.d
##下载
wget http://mirrors.163.com/.help/CentOS7-Base-163.repo
##备份
mv CentOS-Base.repo CentOS-Base.repo.bak
mv CentOS7-Base-163.repo CentOS-Base.repo

2）更新

#配置生效
yum makecache

#验证yum源
yum repolist

#更新包
yum clean all
yum update