Linux命令——getent

getent命令帮助用户administrative databases中查找相关信息。administrative databases包括：

• • passwd – can be used to confirm usernames, userids, home directories and full names of your users
  • group – all the information about Unix groups known to your system
  • services – all the Unix services configured on your system
  • networks – networking information – what networks your system belongs to
  • protocols – everything your system knows about network protocols

一般语法

getent database [key ...]

getent会在上面数据库中产找key对应的value

举例

查找hostname对应的IP

ubuntu$ getent hosts ubuntu
127.0.1.1       ubuntu
192.168.0.2     ubuntu

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