CentOS环境构建

注：centos中类似cnf命令的用法为：yum provides "*/ping"

docker pull centos

docker run -itd --name centos-test centos

docker ps

docker exec -it [容器ID] /bin/bash

cd /etc/yum.repos.d

vi CentOS-Base.repo
mirrorlist注释，将baseurl 修改为阿里源为 baseurl=https://mirrors.aliyun.com/centos/8-stream/BaseOS/x86_64/os/

vi CentOS-AppStream.repo
mirrorlist注释，将baseurl 修改为阿里源为 baseurl=https://mirrors.aliyun.com/centos/8-stream/AppStream/x86_64/os/

vim CentOS-Extras.repo
mirrorlist注释，将baseurl 修改为阿里源为 baseurl=https://mirrors.aliyun.com/centos/8-stream/extras/x86_64/os/

yum update --nobest

yum upgrade --nobest

yum install wget

cd /etc/yum.repos.d

mkdir bak

mv CentOS-Base.repo bak/

wget http://mirrors.aliyun.com/repo/Centos-8.repo

yum clean all

yum makecache

yum install -y yum-utils

卸载python
注意卸载的时候python后跟的2或3或者什么都不跟，否则会全部删除
rpm -qa|grep python3|xargs rpm -ev --allmatches --nodeps
whereis python3 |xargs rm -frv