1. ifconfig command
yum install net-tools -y
2. vim editor
yum -y install vim
3. Tab completion key
安装epel 源
yum -y install epel-release
加快yun速度
yum -y install yum-plugin-fastestmirror
安装bash-completion
yum -y install bash-completion
立即生效
source /etc/profile.d/bash_completion.sh
或者退出终端重新登录
4. Alibaba cloud network yum source
将/etc/yum.repos.d/目录下的文件移动到其它目录
mkdir /etc/yum.repos.d/back/
mv /etc/yum.repos.d/*.repo /etc/yum.repos.d/back/
然后执行如下命令下载阿里云网络yum源
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
注释：-O ：表示指定yum源存放位置
yum clean all
yum makecache
yum repolist