shellscript_虚拟机批量复制ip小工具

#!/bin/bash


##################自娱自乐的小工具########################




number="200"




#ehh0   dhcp
#eth1   172.16.ip1.xx
#eth2   172.17.ip2.xx
#eth3   -




#ip前段
ip1="172.16."
ip2="172.17."




#日期
L_data=$(date +%s)




#备份原配置
cp /etc/sysconfig/network-scripts/ifcfg-eth0 /boox/bak/ifcfg-eth0-$L_data
cp /etc/sysconfig/network-scripts/ifcfg-eth1 /boox/bak/ifcfg-eth1-$L_data
cp /etc/sysconfig/network-scripts/ifcfg-eth2 /boox/bak/ifcfg-eth2-$L_data
cp /etc/sysconfig/network-scripts/ifcfg-eth3 /boox/bak/ifcfg-eth3-$L_data




#删除现有配置
#现有配置中MAC地址是错的,删了就删了
rm -f /etc/sysconfig/network-scripts/ifcfg-eth*




#eth0设置为DHCP
nmcli connection add type ethernet con-name eth0 ifname eth0
#这条命令会自动生成ifcfg-eth*文件,其中的HWDDR为当前网卡




#eth0网卡MAC地址的末两位
var=$(ip add show eth0  | awk '{print $2}' | head -n 2 | tail -n 1)




var=${var//:/ }
for element in $var   
do  
    mac=$(echo $element)  
done  




ip=$(echo $((16#$mac)))




nmcli connection add con-name eth1 ifname eth1 type ethernet ip4 $ip1$number.$ip/16
nmcli connection add con-name eth2 ifname eth2 type ethernet ip4 $ip2$number.$ip/16








hostnamectl set-hostname Centos-$number-$ip




systemctl restart network.service




ip add