Linux Shell three automatic modification to static IP

This script is mainly used to modify the IP address to static!

#!/bin/bash# #Target:  auto chmod ip information! #Date:  2015-05-10#author: jacken# Qq:654001593#qq group:170544180#version: 1.0#only allow define variableshopt -s  -o nounset#define variableethconfig= '/etc/sysconfig/network-scripts/ifcfg-eth1 ' HOSTS= '/etc/ Hosts ' network= '/etc/sysconfig/network ' bakdir= "/data/backup/' date +%y%m%d '" netmask= ' 255.255.255.0 ' GATEWAY= ' 192.168.1.254 ' dns1= ' 8.8.8.8 ' ################################################################################# ################################## #Define  function####################################################### ##################################################### #function  change_ip () {#Create  Directoryif  [ ! -d  $BAKDIR  ];thenmkdir -p  $BAKDIRfi #prompt information#backup  network filecp  $ETHCONFIG   $BAKDIR/' date +%y%m%d ' .${ethconfig:37}$$ &&  echo -e  "\e[32mnow change ip address, backup interface ${ethconfig:37} to $ bakdir done\e[0m "#Judge  Get Ip Modeif  ' grep -q  -i   ' DHCP '   $ETHCONFIG '  ;then#Change Get Ip Modesed -i  ' s/dhcp/static/ig '  $ ethconfig sed -i  ' s/^dns/#DNS/ig '    $ETHCONFIGecho  -e  "ipaddr= $IPADDR \ nnetmask= $NETMASK \ngateway= $GATEWAY \ndns1= $DNS 1 " >>  $ETHCONFIG           echo -e  ' \e[32mip change success!\e[0m ' else#warning  informationecho -e  "\e[31mthe network alreday is static,please ensure  yes or no:  " read i                  #Again  Confirmif [  "$i"  ==  "y"  -o  "$i"  = =  "yes"  -o  "$i"  ==  " YES " ];then#Comment Old Configure sed -i -e  ' s/^ipaddr/#IPADDR/g '  -e   ' s/^netmask/#NETMASK/g '  -e  ' s/^gateway/#GATEWAY/g '  -e  ' s/^dns/#DNS/g '  $ ethconfigecho -e  "ipaddr= $IPADDR \nnetmask= $NETMASK \ngateway= $GATEWAY \ndns1= $DNS 1"  >>   $ETHCONFIG  echo -e  "\e[32mthe ip address is  $IPADDR  ,change  success!\e[0m "else#exitecho -e " \e[31mthis  $ETHCONFIG  static exist,  exiting...\e[0m "fifi}################################################################################ #Check  IP ADDRESSFUNCTION CHECK_IP () {read -p  "please input ip address:  " IPADDR#Test IP Formatecho  $IPADDR |grep " ^[0-9]\{1,3\}\. [0-9]\{1,3\}\. [0-9]\{1,3\}\. [0-9]\{1,3\}$]  > /dev/null 2>&1num=$?if [  $num  -ne 0 ]; thenecho -e  "\e[31mplease&nbsP check ip format exiting....\e[0m "Exit 2else#get part of ip a= ' echo   $IPADDR |awk -f.  ' {print $1} ' b= ' echo  $IPADDR |awk -f.  ' {print $2} ' c= ' echo  $IPADDR |awk -f.  ' {print $3} ' d= ' echo  $IPADDR |awk -f.  ' {print $4} ' ' if [  $a  -gt 255 ] | |   [  $a  -le 0 ];thenecho -e  "\e[31mplease check ip  format exiting...\e[0m "exit 2fiif [  $b  -gt 255 ] | |  [  $b  -lt 0 ];thenecho -e  "\e[31mplease check ip format  exiting...\e[0m "exit 2fiif [  $c  -gt 255 ] | |  [  $c  -lt 0 ];thenecho -e  "\e[31mplease check ip format  exiting...\e[0m "exit 2fiif [  $d  -ge 255 ] | |  [  $d  -le 0 ];thenecho -e  "\e[31mplease check ip format exiting...\e[0m" exit 2fiexport $ Ipaddrfi} #Define  ps3ps3= "Please select your choose:" select i in  "change  IP AND DNS FOR ${ETHCONFIG:37} " " show ${ethconfig:37} config  File "  " restart device ${ethconfig:37} " " Show ${ethconfig:37} status "    "Exit"  do choose= $REPLYcase   $CHOOSE  in 1) check_ipchange_ip;; 2) cat  $ETHCONFIG;; 3) ifdown ${ethconfig:37} > /dev/null 2>&1 && ifup ${ Ethconfig:37} > /dev/null 2>&1if [ $? -eq 0 ];then echo  -e  "\e[32mrestart device ${ethconfig:37} success.\e[0m" elseecho -e  "\e[ 31mrestart device ${ethconfig:37} failure.\e[0m "FI;; 4) ifconfig ${ethconfig:37};; 5) echo -e  ' \e[32mbyebye!\e[0m ' exit; *) echo -e  ' \e[31merror number,please input again! ' Esacdone

Demonstrate:

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This article is from the "Step Into the Linux World" blog, please be sure to keep this source http://linuxnote.blog.51cto.com/9876511/1650076

Linux Shell three automatic modification to static IP