系统安装后的初始化操作：
1.关闭selinux：
sed -i '/SELINUX/s/enforcing/disabled/' /etc/sysconfig/selinux
临时禁用：setenforce 0
2.关闭防火墙：
systemctl disable firewalld
systemctl stop firewalld
3.网卡设置为nat模式：更改配置文件，ip地址根据需要更改
[root@localhost ~]# vim /etc/sysconfig/network-scripts/ifcfg-ens33
DEVICE=ens33
TYPE=Ethernet
onBOOT=yes
BOOTPROTO=static
IPADDR=192.168.200.111
NETMASK=255.255.255.0
DNS1=192.168.200.2
GATEWAY=192.168.200.2
systemctl restart network
4、设置主机名和ip地址映射
vim /etc/hosts
192.168.200.111 server01
192.168.200.112 server02
192.168.200.113 server03
192.168.200.114 server04
192.168.200.115 server05
5、配置主机名
vim /etc/hostname
server01
6、配置免交互的ssh
ssh-keygen
ssh-copy-id 192.168.200.112
ssh-copy-id 192.168.200.113
ssh-copy-id 192.168.200.114
ssh-copy-id 192.168.200.115
7.配置yum源：导入光盘
mount /dev/sr0 /media/
echo "/dev/sr0 /media/ iso9660 defaults 0 0" >> /etc/fstab
rm -rf /etc/yum.repos.d/*
cat >> /etc/yum.repos.d/cdrom.repo << EOF
[cdrom]
name=cdrom yum
baseurl=file:///media/
gpgcheck=0
EOF
8.安装必备软件包：
yum -y install gcc gcc-c++ make autoconf libtool-ltdl-devel gd-devel freetype-devel libxml2-devel libjpeg-devel libpng-devel openssl-devel curl-devel bison patch unzip libmcrypt-devel libmhash-devel ncurses-devel sudo bzip2 mlocate flex lrzsz sysstat lsof setuptool system-config-network-tui system-config-firewall-tui ntp libaio-devel wget nmap finger elinks
init 0
保存快照并命名
