CentOS7优化

1. 下载常用的rpm
   yum -y install bash-completion lrzsz ntpdate sysstat net-tools tree wget vim -y

2. 配置阿里的yum源
   CentOS 6
   wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo
   或者
   curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo

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

3. 网卡的配置
   BOOTPROTO=static
   ONBOOT=yes
   IPADDR=
   NETMASK=
   GATEWAY=
   DNS1=223.5.5.5
   DNS2=223.6.6.6

4. 修改selinux

5. 关闭firewalld

CentOS7优化

原文：https://www.cnblogs.com/plf-Jack/p/11254308.html