linux 配置IP和主機名腳本

配置IP和主機名腳本

#!/bin/bash

ETH_NAME=$(ip link | grep ^[0-9] | grep -v lo | awk '{print $2}' | awk -F: '/^e/{print $1}')

# 判斷IP地址是否合法
function args_is_legality() {
        regex="\b(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[1-9])\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9])\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9])\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[1-9])\b"
        ckStep2=`echo $1 | egrep $regex | wc -l`
        if [ $ckStep2 -eq 0 ]
            then
                echo "The string $1 is not a correct ipaddr!!!"
                exit 1
        fi
}


while getopts "a:g:d:h:" arg #選項後面的冒號表示該選項需要參數
do
    case $arg in
        a)
            args_is_legality $OPTARG
            ADDR=$OPTARG
        ;;
        g)
            args_is_legality $OPTARG
            GW=$OPTARG
        ;;
        d)
            args_is_legality $OPTARG
            DNS=$OPTARG
        ;;
        h)
            hostnamectl set-hostname $OPTARG
        ;;
        :)
            echo "The option -$OPTARG requires an argument"
            exit 1
        ;;
        ?)
            echo "unkonw argument"
            exit 1
        ;;
    esac
done



cat << EOF >/etc/sysconfig/network-scripts/ifcfg-$ETH_NAME
TYPE=Ethernet
BOOTPROTO=none
NAME=$ETH_NAME
DEVICE=$ETH_NAME
ONBOOT=yes
IPADDR=$ADDR
NETMASK=255.255.255.0
GATEWAY=$GW
DNS1=$DNS
EOF

#systemctl restart network              # redhat7
#service network restart                # redhat6