RHEL系统初始化

#!/bin/bash

##初始化网络（可在虚拟网络编辑器查看自己的网段）
##方法一：静态初始化
read -p "输入你当前Linux的IP地址："  ip
ETH=` ifconfig -a | head -1 | awk -F ":"  ‘{print $1}‘`
GATE="`echo $ip | awk -F "." ‘{print $1"."$2"."$3"."}‘`.2"
cat > /etc/sysconfig/network-scripts/ifcfg-$ETH <<EOF
TYPE=Ethernet
BOOTPROTO=static
NAME=$ETH
DEVICE=$ETH
IPADDR="$ip"
GATEWAY=$GATE
ONBOOT=yes
DNS1=8.8.8.8
EOF
##方法2：dhcp分配
cat > /etc/sysconfig/network-scripts/ifcfg-$ETH <<EOF

TYPE=Ethernet
BOOTPROTO=dhcp
NAME=$ETH
DEVICE=$ETH
ONBOOT=yes
EOF 

##更改主机名（RHEL6） 
cat > /etc/sysconfig/network <<EOF 
NETWORKING=yes 
HOSTNAME=server-123 
EOF 
##更改主机名（RHEL7） 
hostnamectl --static set-hostname server-123

##关闭防火墙(RHEL6) 
iptables -t filter -F 
iptables -t nat -F 
service iptables save 
service iptables stop       
chkconfig iptables off     
chkconfig ip6tables off
chkconfig ip6tables off

##关闭防火墙(RHEL7)

iptables -t filter -F
iptables -t nat -F
systemctl save iptables 
systemctl stop iptables 
systemctl disabled iptables

##禁用SELinux 
sed -ir ‘/SELINUX/{s/enforcing/disabled/}‘ /etc/selinux/config 

##将sr0永久性挂载
 mkdir /iso chmod u+x /etc/rc.d/rc.local echo "mount /dev/sr0 /iso" >> /etc/rc.d/rc.local

 ##配置yum源
 touch /etc/yum.repos.d/base.repo
 cat > /etc/yum.repos.d/base.repo << EOF
 [base]
 name=mybase
 baseurl=file:///iso/ 
enabled=1 
gpgcheck=0
 EOF


##适用于REHL6,RHEL7 
##执行脚本后虚拟机会关机重启
 init 6