Comandos de la terminal/tail

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tail

 tail [OPTION]... [FILE]...

       -c, --bytes=K
              output the last K bytes; alternatively,  use  -c  +K  to  output
              bytes starting with the Kth of each file

       -f, --follow[={name|descriptor}]
              output appended data as the file grows; -f, --follow, and --fol‐
              low=descriptor are equivalent

       -F     same as --follow=name --retry

       -n, --lines=K
              output the last K lines, instead of the last 10; or use -n +K to
              output lines starting with the Kth

       --max-unchanged-stats=N
              with  --follow=name,  reopen  a  FILE which has not changed size
              after N (default 5) iterations to see if it has been unlinked or
              renamed  (this  is  the  usual case of rotated log files).  With
              inotify, this option is rarely useful.

       --pid=PID
              with -f, terminate after process ID, PID dies

       -q, --quiet, --silent
              never output headers giving file names

       --retry
              keep trying to open a file even when it is or becomes inaccessi‐
              ble; useful when following by name, i.e., with --follow=name

       -s, --sleep-interval=N
              with -f, sleep for approximately N seconds (default 1.0) between
              iterations.  With inotify and --pid=P, check process P at  least
              once every N seconds.

       -v, --verbose
              always output headers giving file names

       --help display this help and exit

       --version
              output version information and exit

       If  the  first  character of K (the number of bytes or lines) is a '+',
       print beginning with the Kth item from the start of each  file,  other‐
       wise, print the last K items in the file.  K may have a multiplier suf‐
       fix:  b  512,  kB  1000,  K  1024,  MB  1000*1000,  M   1024*1024,   GB
       1000*1000*1000, G 1024*1024*1024, and so on for T, P, E, Z, Y.

[rrc@pridd ~]$ tail /var/www/almastock.asambiental.mx/index.php 
        else
          print( "<p style=\"text-align:center; margin-top:3px;\">
                    <img src=\"imagenes/asa_logo.png\" alt=\"asa_logo.png\" />
                  </p>" );
        if( isset( $Block ) )
          echo( "$Block" );
      ?>
    </div>
  </body>
</html>

[rrc@pridd ~]$ tail -c 235 /var/www/almastock.asambiental.mx/index.php 
align:center; margin-top:3px;\">
                    <img src=\"imagenes/asa_logo.png\" alt=\"asa_logo.png\" />
                  </p>" );
        if( isset( $Block ) )
          echo( "$Block" );
      ?>
    </div>
  </body>
</html>

[rrc@pridd ~]$ tail -c +11500 /var/www/almastock.asambiental.mx/index.php 
-align:center; margin-top:3px;\">
                    <img src=\"imagenes/asa_logo.png\" alt=\"asa_logo.png\" />
                  </p>" );
        if( isset( $Block ) )
          echo( "$Block" );
      ?>
    </div>
  </body>
</html>

[rrc@pridd ~]$ tail -c +11K /var/www/almastock.asambiental.mx/index.php 
rel="stylesheet" type="text/css" href="includes/Almastock.css" />
  </head>
  <body>
    <div class="content">
      <?php
        if( @$_SESSION{'Nivel'} )
          require( "Menu.php" );
        else
          print( "<p style=\"text-align:center; margin-top:3px;\">
                    <img src=\"imagenes/asa_logo.png\" alt=\"asa_logo.png\" />
                  </p>" );
        if( isset( $Block ) )
          echo( "$Block" );
      ?>
    </div>
  </body>
</html>

[rrc@pridd ~]$ tail -n 5 /var/www/almastock.asambiental.mx/index.php 
          echo( "$Block" );
      ?>
    </div>
  </body>
</html>

[rrc@pridd ~]$ tail -n +360 /var/www/almastock.asambiental.mx/index.php 
        if( isset( $Block ) )
          echo( "$Block" );
      ?>
    </div>
  </body>
</html>

[rrc@pridd ~]$ tail -vn +360 /var/www/almastock.asambiental.mx/index.php 
==> /var/www/almastock.asambiental.mx/index.php <==
        if( isset( $Block ) )
          echo( "$Block" );
      ?>
    </div>
  </body>
</html>

[rrc@pridd ~]$ tail --version
tail (GNU coreutils) 8.20
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by Paul Rubin, David MacKenzie, Ian Lance Taylor,
and Jim Meyering.
Obtenido de «http://wiki.cabal.mx/index.php?title=Comandos_de_la_terminal/tail&oldid=5045»