部署知识：准备工作

查看ip

• ifconfig
• ip addr
• vi /etc/sysconfig/network-scripts/ifcfg-xx
• yum install net-tools

查看系统版本

• cat /etc/readhat-release

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1. 可以使用 ifconfig

   yum install net-tools

2. 安装 wget

   yum install wget

3. 替换默认源

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
cd /etc/yum.repos.d/
# 拿到新源地址并替换
wget http://mirrors.163.com/.help/CentOS7-Base-163.repo
yum clean all
yum makecache
yum install vim
# 验证 vim 已装上 
vim /etc/sysconfig/network-scripts/ifcfg-eth0
# 输了ifcfg按tab可提示