info

一、作用

基于菜单选择的超文本帮助工具，用于阅读Info格式的文档

二、选项

快捷键
u：进入上一层信息（回车是进入下一层信息）
n：进入下一小节信息
P：进入上一小节信息
?：査看帮助信息
q：退出

三、实例

[root@localhost ~]# info ls

     listed on the command line unless the '--dereference-command-line'
     ('-H'), '--dereference' ('-L'), or
     '--dereference-command-line-symlink-to-dir' options are specified.

'-H'
'--dereference-command-line'
     If a command line argument specifies a symbolic link, show
     information for the file the link references rather than for the
     link itself.

'--dereference-command-line-symlink-to-dir'
     Do not dereference symbolic links, with one exception: if a command
     line argument specifies a symbolic link that refers to a directory,
     show information for that directory rather than for the link
     itself.  This is the default behavior when no other
     dereferencing-related option has been specified ('--classify'
     ('-F'), '--directory' ('-d'), ('-l'), '--dereference' ('-L'), or
     '--dereference-command-line' ('-H')).

'--group-directories-first'
     Group all the directories before the files and then sort the
     directories and the files separately using the selected sort key
     (see -sort option).  That is, this option specifies a primary sort
     key, and the -sort option specifies a secondary key.  However, any
     use of '--sort=none' ('-U') disables this option altogether.