man命令的解释：

man的全称是manual,手册的意思，所以man命令有帮助解释其它命令的作用

基本用法：

man + 命令

比如：

man pwd

就会出现下面信息

 

PWD(1) User Commands  PWD(1)   
//注意括号中的数字  
NAME   //关于命令的名次和说明pwd - print name of current/working directory   SYNOPSIS   //命令的几本语法pwd [OPTION]   DESCRIPTION   //详细描述语法参数的使用方法Print the full filename of the current working directory.   --help display this help and exit   --version   output version information and exit   NOTE:  your shell may have its own version of pwd, which usually super-   sedes the version described here.  Please refer to your  shell's  docu-   mentation for details about the options it supports.   AUTHOR   //作者信息Written by Jim Meyering.   REPORTING BUGS   //作者的联系方式Report bugs to <bug-coreutils&