Fast forward-backward (write-read)

[Virgil Stokes]

On 23-Oct-2012 22:03, Cousin Stanley wrote:
> Virgil Stokes wrote:
>
>> Not sure about "tac" --- could you provide more details on this
>> and/or a simple example of how it could be used for fast reversed
>> "reading" of a data file ?
>    tac is available as a command under linux ....
>
>    $ whatis tac
>    tac (1) - concatenate and print files in reverse
>
>    $ whereis tac
>    tac: /usr/bin/tac /usr/bin/X11/tac /usr/share/man/man1/tac.1.gz
>
>    $ man tac
>
>    SYNOPSIS
>      tac [OPTION]... [FILE]...
>
>    DESCRIPTION
>
>      Write each FILE to standard output, last line first.
>
>      With no FILE, or when FILE is -, read standard input.
>
>
>    I only know that the  tac  command exists
>    but have never used it myself ....
>
>
Unfortunately, I may be forced to process the data on a Windows platform; but, 
thanks Cousin for the Linux tip.