如何从类似于/etc/hosts的文件中的IP地址获取主机名 [英] How to get hostname from IP address from file similar to /etc/hosts

问题描述

我有一个将IP地址映射到主机名的文件.其格式类似于hosts文件，并包含ipaddress到主机名映射的列表.

I have a file which maps IP Address to hostname. Its format is similar to hosts file and contains a list of ipaddress to hostname mapping.

例如

10.200.99.1    master1
10.200.99.2    master2
10.200.99.3    master3
10.200.99.4    slave1
10.200.99.5    slave2
10.200.99.6    slave3
...
...
...

我想使用bash脚本从给定的ipaddress获取主机名.

I would like to obtain hostname from a given ipaddress using bash script.

我该怎么办?

推荐答案

我有一个简单得多的解决方案

I got a much simpler solution

#!/bin/bash

### GET IP ADDRESS ###
    echo  "IP Address ?"
    echo -n "(Value and press Enter) :"
    read ip_address

### Find Hostname matching to IPADDRESS ###
    grep  $ip_address /etc/hosts | awk '{print $2}'

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