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man

[rrc@pridd ~]$ man --version
man, version 1.6g

[rrc@pridd ~]$ man --help
man, version 1.6g

usage: man [-adfhktwW] [section] [-M path] [-P pager] [-S list]
	[-m system] [-p string] name ...

  a : find all matching entries
  c : do not use cat file
  d : print gobs of debugging information
  D : as for -d, but also display the pages
  f : same as whatis(1)
  h : print this help message
  k : same as apropos(1)
  K : search for a string in all pages
  t : use troff to format pages for printing
  w : print location of man page(s) that would be displayed
      (if no name given: print directories that would be searched)
  W : as for -w, but display filenames only

  C file   : use `file' as configuration file
  M path   : set search path for manual pages to `path'
  P pager  : use program `pager' to display pages
  S list   : colon separated section list
  m system : search for alternate system's man pages
  p string : string tells which preprocessors to run
               e - [n]eqn(1)   p - pic(1)    t - tbl(1)
               g - grap(1)     r - refer(1)  v - vgrind(1)
secciones:

0p      POSIX Programmer's Manual header files
1 	General commands
1p      POSIX Programmer's Manual Utilities
2 	System calls
3 	Library functions, covering in particular the C standard library
3p      POSIX Programmer's Manual Functions
3pm     Perl Programmers Reference Guide
4 	Special files (usually devices, those found in /dev) and drivers
5 	File formats and conventions
6 	Games and screensavers
7 	Miscellanea
8 	System administration commands and daemons
9       Kernel Functions
n       Tcl Built-In Commands


[rrc@Llawyr man]$ man write
WRITE(1)                         User Commands                        WRITE(1)

NAME
       write - send a message to another user

SYNOPSIS
       write user [ttyname]

DESCRIPTION
       Write allows you to communicate with other users, by copying lines from
       your terminal to theirs.
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[rrc@Llawyr man]$ man 3p write
WRITE(3P)                  POSIX Programmer's Manual                 WRITE(3P)

PROLOG
       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
       implementation of this interface may differ (consult the  corresponding
       Linux  manual page for details of Linux behavior), or the interface may
       not be implemented on Linux.

NAME
       pwrite, write - write on a file

SYNOPSIS
       #include <unistd.h>

       ssize_t pwrite(int fildes, const void *buf, size_t nbyte,
              off_t offset);
       ssize_t write(int fildes, const void *buf, size_t nbyte);

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[rrc@Llawyr man]$ man 2 write
WRITE(2)                   Linux Programmer's Manual                  WRITE(2)

NAME
       write - write to a file descriptor

SYNOPSIS
       #include <unistd.h>

       ssize_t write(int fd, const void *buf, size_t count);

DESCRIPTION
       write()  writes  up  to  count bytes from the buffer pointed buf to the
       file referred to by the file descriptor fd.

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[rrc@Llawyr man]$ man 1p write
WRITE(1P)                  POSIX Programmer's Manual                 WRITE(1P)

PROLOG
       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
       implementation of this interface may differ (consult the  corresponding
       Linux  manual page for details of Linux behavior), or the interface may
       not be implemented on Linux.

NAME
       write - write to another user

SYNOPSIS
       write user_name [terminal]

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