man 用法的疑问

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终于知道了man 还可以拿来man

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NAME
       man - format and display the on-line manual pages

SYNOPSIS
       man  [-acdfFhkKtwW] [--path] [-m system] [-p string] [-C config_file] [-M pathlist]
       [-P pager] [-B browser] [-H htmlpager] [-S section_list] [section] name ...

DESCRIPTION
       man formats and displays the on-line manual pages.  If  you  specify  section,  man
       only  looks in that section of the manual.  name is normally the name of the manual
       page, which is typically the name of a command, function,  or  file.   However,  if
       name  contains  a slash (/) then man interprets it as a file specification, so that
       you can do man ./foo.5 or even man /cd/foo/bar.1.gz.

       See below for a description of where man looks for the manual page files.

OPTIONS
       -C  config_file
              Specify the configuration file to use;  the  default  is  /usr/lib/man.conf.
              (See man.conf(5).)

       -M  path
              Specify  the  list  of  directories  to  search for man pages.  Separate the
              directories with colons.  An empty list is the same as not specifying -M  at
              all.  See SEARCH PATH FOR MANUAL PAGES.

       -P  pager
              Specify  which pager to use.  This option overrides the MANPAGER environment
              variable, which in turn overrides the PAGER variable.  By default, man  uses
              /usr/bin/less -is.

       -B     Specify  which  browser  to  use  on  HTML files.  This option overrides the
              BROWSER environment variable. By default, man uses /usr/bin/lynx,

ivhb

catman -w
man -k

虑而后能得

heh  google 搜一下