Shell脚本实现自动修改IP地址
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2022-06-20 20:25:18
作为一名linux sa,日常运维中很多地方都会用到脚本,而服务器的ip一般采用静态ip或者mac绑定,当然后者比较操作起来相对繁琐,而前者我们可以设置主机名、ip信息、网...
作为一名linux sa,日常运维中很多地方都会用到脚本,而服务器的ip一般采用静态ip或者mac绑定,当然后者比较操作起来相对繁琐,而前者我们可以设置主机名、ip信息、网关等配置。修改成特定的主机名在维护和管理方面也比较方便。如下脚本用途为:修改ip和主机名等相关信息,可以根据实际需求修改,举一反三!
#!/bin/sh #auto change ip netmask gateway scripts #wugk 2012-12-17 cat << eof ++++++++自动修改ip和主机名等相关信息+++++++++ ethconf=/etc/sysconfig/network-scripts/ifcfg-eth0 hosts=/etc/hosts network=/etc/sysconfig/network dir=/data/backup/`date +%y%m%d` netmask=255.255.255.0 +++++++++-------------------------+++++++++++ eof #define path 定义变量,可以根据实际情况修改 ethconf=/etc/sysconfig/network-scripts/ifcfg-eth0 hosts=/etc/hosts network=/etc/sysconfig/network dir=/data/backup/`date +%y%m%d` netmask=255.255.255.0 echo "================================================" echo #定义change_ip函数 function change_ip () { #判断备份目录是否存在,中括号前后都有空格,!叹号在shell表示相反的意思# if [ ! -d $dir ];then mkdir -p $dir fi echo "now change ip address ,doing backup interface eth0" cp $ethconf $dir grep "dhcp" $ethconf #如下$?用来判断上一次操作的状态,为0,表示上一次操作状态正确或者成功# if [ $? -eq 0 ];then #read -p 交互输入变量ipaddr,注冒号后有空格,sed -i 修改配置文件# read -p "please insert ip address:" ipaddr sed -i 's/dhcp/static/g' $ethconf #awk -f. 意思是以.号为分隔域,打印前三列# echo -e "ipaddr=$ipaddr\nnetmask=$netmask\ngateway=`echo $ipaddr|awk -f. '{print $1"."$2"."$3}'`.254" >>$ethconf echo "this ip address change success !" else echo -n "this $ethconf is static exist ,please ensure change yes or no": read i fi if [ "$i" == "y" -o "$i" == "yes" ];then read -p "please insert ip address:" ipaddr count=(`echo $ipaddr|awk -f. '{print $1,$2,$3,$4}'`) #定义数组, ${#count[@]}代表获取变量值总个数# a=${#count[@]} #while条件语句判断,个数是否正确,不正确循环提示输入,也可以用[0-9]来判断ip# while [ "$a" -ne "4" ] do read -p "please re inster ip address,example 192.168.0.11 ip": ipaddr count=(`echo $ipaddr|awk -f. '{print $1,$2,$3,$4}'`) a=${#count[@]} done #sed -e 可以连续修改多个参数# sed -i -e 's/^ipaddr/#ipaddr/g' -e 's/^netmask/#netmask/g' -e 's/^gateway/#gateway/g' $ethconf #echo -e \n为连续追加内容,并自动换行# echo -e "ipaddr=$ipaddr\nnetmask=$netmask\ngateway=`echo $ipaddr|awk -f. '{print $1"."$2"."$3}'`.254" >>$ethconf echo "this ip address change success !" else echo "this $ethconf static exist,please exit" exit $? fi } #定义hosts函数 ############function hosts############## function change_hosts () { if [ ! -d $dir ];then mkdir -p $dir fi cp $hosts $dir read -p "please insert ip address": ipaddr host=`echo $ipaddr|sed 's/\./-/g'` cat $hosts |grep 127.0.0.1 |grep "$host" if [ $? -ne 0 ];then sed -i "s/127.0.0.1/127.0.0.1 $host/g" $hosts echo "this hosts change success " else echo "this $host is exist .........." fi } ###########fuction network############### #定义network函数 function change_network () { if [ ! -d $dir ];then mkdir -p $dir fi cp $network $dir read -p "please insert ip address": ipaddr host=`echo $ipaddr|sed 's/\./-/g'` grep "$host" $network if [ $? -ne 0 ];then sed -i "s/^hostname/#hostname/g" $network echo "network=$host" >>$network else echo "this $host is exist .........." fi } #ps3一般为菜单提示信息# ps3="please select ip or hosts menu": #select为菜单选择命令,格式为select $var in ..command.. do .... done select i in "change_ip" "change_hosts" "change_network" do #case 方式,一般用于多种条件下的判断 case $i in change_ip ) change_ip ;; change_hosts ) change_hosts ;; change_network ) change_network ;; *) echo echo "please insert $0: change_ip(1)|change_hosts(2)|change_network(3)" echo ;; esac done