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Full Discussion: Nohup not returns to the prompt
Top Forums UNIX for Dummies Questions & Answers Nohup not returns to the prompt Post 302779901 by alister on Wednesday 13th of March 2013 12:48:31 PM
Old 03-13-2013
Quote:
Originally Posted by itkamaraj
Code:
nohup ./script args > /tmp/out.txt &

Quote:
Originally Posted by pandeesh
It's working. But what makes the difference and how it works?
Thanks,
Quote:
Originally Posted by Corona688
The only difference is redirecting the message to the text file. Otherwise they act the same.
Actually, the message is not redirected; the message is simply not generated.

That informational message is written by nohup to stderr only when stdout is a terminal, forcing it to choose a new destination for stdout (and possibly stderr, if it to is a terminal).

Regards,
Alister
 

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LEARN ABOUT V7

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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