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Full Discussion: Question is redundant but please advice
Top Forums UNIX for Dummies Questions & Answers Question is redundant but please advice Post 302137577 by porter on Tuesday 25th of September 2007 10:01:03 PM
Old 09-25-2007
Quote:
Originally Posted by Legend986
So if I want to implement a hypothetical uwhich command that immitates the original which command, would that come under shell programming?
or pascal, or C or C++ or Java or Perl or whatever language you chose to write your "uwhich" program in.

Quote:
Originally Posted by Legend986
And finally, are there any unix simulators where i can do all this stuff or do you recommend me to install unix altogether?
Why simulate when you can have the real deal?

What are you intending to simulate on? And what is your definition of UNIX?

If I am to guess that you are using Microsoft Windows, then you could do worse than try Cygwin or even Microsoft's very own "Services For UNIX".

I have also had great success running UNIX Version 7 on a PDP-11 emulator running on a Linux machine if that is what you mean.
 

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LEARN ABOUT MINIX

ppmtopgm

ppmtopgm(1)                                                   General Commands Manual                                                  ppmtopgm(1)

NAME

       ppmtopgm - convert a portable pixmap into a portable graymap

SYNOPSIS

       ppmtopgm [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as  input.  Produces a portable graymap as output.  The output is a "black and white" rendering of the original
       image, as in a black and white photograph.  The quantization formula used is .299 r + .587 g + .114 b.

       Note that although there is a pgmtoppm program, it is not necessary for simple conversions from pgm to ppm , because any  ppm  program  can
       read  pgm  (and  pbm  ) files automatically.  pgmtoppm is for colorizing a pgm file.  Also, see ppmtorgb3 for a different way of converting
       color to gray.  And ppmdist generates a grayscale image from a color image, but in a way that makes it easy to differentiate  the  original
       colors, not necessarily a way that looks like a black and white photograph.

QUOTE

       Cold-hearted orb that rules the night
       Removes the colors from our sight
       Red is gray, and yellow white
       But we decide which is right
       And which is a quantization error.

SEE ALSO

       pgmtoppm(1),ppmtorgb3(1),rgb3toppm(1),ppmdist(1),ppm(5),pgm(5)

AUTHOR

       Copyright (C) 1989 by Jef Poskanzer.

                                                                   10 April 2000                                                       ppmtopgm(1)
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