shell脚本更新或者添加host

shell脚本更新或者添加host

 

脚本可以根据传入的参数进行对 /etc/hosts 更改或者添加host

 

例如执行 sudo ./changeHost.sh blog.duplicatedcode.com 192.168.1.222

 

域名是固定的,外网ip不断变化

 

# !/bin/sh

###################

#@in_url 输入的url

#@in_ip 输入的ip

##########################

in_url=${1}

in_ip=${2}

 

#更改host

updateHost()

{

# read 

  inner_host=`cat /etc/hosts | grep ${in_url} | awk '{print $1}'`

  if [ ${inner_host} = ${in_ip} ];then

     echo "${inner_host}  ${in_url} ok"

  else

    #替换

     sed -i "s#${inner_host}#${in_ip}#g" /etc/hosts

     if [ $? = 0 ];then

       echo "change ${inner_host} to ${in_ip} ok"

       else 

         inner_ip_map="${in_ip} ${in_url}"

         echo ${inner_ip_map} >> /etc/hosts

         if [ $? = 0 ]; then

           echo "${inner_ip_map} to hosts success host is `cat /etc/hosts`"

         fi

     fi

  fi

}

 

main()

{

   updateHost

}

main