Bash-shell-scripts Advanced Script Configuration IP address

[[email protected] shell]# cat mod_ip_hostname.sh #!/bin/bash#auto modify  Ip and hostname#by colin on 2015-05-07ip_config= '/etc/sysconfig/network-scripts/ Ifcfg-eth0 ' hostname_config= '/etc/sysconfig/network ' hosts_config= '/etc/hosts ' #定义一个IP主要内容数组a =0  # Defines the variable a as an array subscript, dynamically used when calling ip_array[a]ip_array= (IPADDRNATMASKGATEWAYDNS1DNS2) #判断IP是否符合标准规则function  judge_ip () {          #这里local  $1 error, using 2>/dev/null to screen out errors, not found to affect the output results          local $1 2>/dev/null         TMP_TXT=/tmp/iptmp.txt        echo $1 >  ${tmp_txt}        ip_addr= ' grep -eo  ' ([0-9]{1,3}\.) {3} [0-9] {1,3} '  ${tmp_txt} '          #判断有没有符合 ip  of the ***.***.***.*** rule        if [ ! -z  "${ip_addr}"  ];then                 local j=0;                  #通过循环来检测每个点之前的数值是否符合要求                  for  ((i=1;i<=4;i++))                  do                          local ip_num= ' echo  "${ip_addr}"  |awk -F.  "{print $" $i "}" '                           #判断IP_NUM是否在0与255之间                          if [  "${ip_num}"  -ge 0 -a  "$ {Ip_num} " -le 255 ];then                                   ((j + +));                         else                                  return 1                         fi                 done                  #通过j的值来确定是否继续匹配规则, Cycle four times, if all are correct j=4.                 if [  "$j"  -eq 4 ]; then                          #确认是否为自己想要输入的IP地址              read -n 1 -p  input ${ip_array[a} has a value of ${ip_addr}, confirm input: y|y; re-enter: R|r: "  OK            case ${OK} in                          y|y)  rm -rf ${TMP_TXT} ; return 0;; &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;R|R)   return 1;;                 *)  return 1;;             esac                 else                          return 1                 fi        else                 return 1        fi}# Get the correct IP value # by calling the function Judge_ip, the final value of the variable ip_addr is the correct function read_right_ip () {         read -p  "Please enter the value of ${ip_array[a]}:"  IP_ADDRS#        ip_addrs= ""     judge_ip  "${iP_addrs} ";     i= ' echo $?      #循环直到输入正确的IP为止      until [  "$i" &NBSP;-EQ&NBSP;0&NBSP;];d O        echo  -e  "\033[31m\n you entered the wrong ${ip_array[a]} value: ${ip_addrs} ====>>>>\033[0m"           read -p  "re-enter ${ip_array[a]}, enter:"  IP_ADDRS         judge_ip  "${ip_addrs}";         i= ' echo $? '     done} #判断网卡配置文件, exists on backup, does not exist create a new blank file Function chang_ip () {         if [ -f ${IP_CONFIG} ];then                 cp ${IP_CONFIG}  ${ip_config}.bak                  #网卡的MAC地址                 hw_addr= ' grep  ' HWADDR '  ${IP_ CONFIG} '                 # IP Configuration Status                 dhcp_ status= ' grep  ' Bootproto '  ${IP_CONFIG} |awk -F=  ' {print toupper ($)} '                   #如果BOOTPROTO的值是DHCP, Continue to set the IP, or quit it                  if [  "${dhcp_status}"  =  ' DHCP '  ];then                         echo -e   "\033[32MIP get: ${dhcp_status}, the following will be modified to static ip...\033[0m"                          rm -rf ${ip_config} & & touch ${IP_CONFIG}; #把部分基本信息导入到网卡配置文件内cat  >${ip_config} <<eofdevice= eth0hwaddrtype=ethernetonboot=yesbootproto=staticeof##########################################                           #把原来MAC地址写进去                          sed -i  "/hwaddr/s/hwaddr/${ Hw_addr}/g " ${IP_CONFIG}                          #循环五次, call the function five times to get all the data you want to set, respectively                           for  (a=0;a<=4;a++))                          do                                  read_right_IP;                                  echo -e  "\033[32m\n${ip_array[a]}=${ip_addrs}\033[0m"                                    #把内容追加到网卡配置文件的最后                                   echo -e  "${ip_array[a]}=${ip_addrs}"  >> ${IP_CONFIG}                          done                         echo -e  "\033[32m\n+++++++ Set the IP-related information as follows +++++++\033[1m "                         cat ${IP_CONFIG};                          echo -e  "\033[32m\n++++++++++++++++++++++++++++++++++\033[0m"                  else                         echo -e  "\033[ 32m system IP is already: ${dhcp_status}, no need to modify ... \033[0m "                  fi        else                 echo -e  "\033[ 31m NIC profile: ${ip_config} does not exist, please check if the system is corrupted ... \033[0m "         fi}# Script Selection Menu menu= (        chang_ip_config         chang_hostname_config        chang_hosts_confg         exit_menu        help_menu) Ps3= "please select menu will running to do  (Need help,Please  input: 5 ):  "Select i in ${menu[@]}do        case  $i  in                 ${menu[0]})                           chang_ip                         if [  "$?"  -eq 0 ];then                                  echo -e  "\033[32m modify IP for static get success ... \033[0m"                           else                                  echo -e  "\033[31m Please check if IP is still getting ... \033[0m"                           fi                 ;; &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;${MENU[1]})  exit ;; &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;${MENU[2]})  exit ;; &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;${MENU[3]})  exit ;; &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;${MENU[4]})                         echo -e  "\033[32m========= Help menu contents are as follows ==========\033[ 0m "                          for  ((i=0;i< "${#menu [@]}"; i++)                           do                                 echo  -e  "\033[33m  ' expr  $i  + 1 ')  ${menu[i]} \033[0m"                           done                 ;;          esacdone 

For more information, please follow: shell-scripts script to modify IP address

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(Source: Linux operation and maintenance training-Keio Linux education website)

The script runs as shown:

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This article is from the "Mountain Road 18 Bend" blog, please be sure to keep this source http://kongzi68.blog.51cto.com/1432619/1649605

Bash-shell-scripts Advanced Script Configuration IP address