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1. UNIX for Dummies Questions & Answers
Hi guys,
I need a help with a query. Basically i want to know the difference between (0+01)* and ((0+01)*)* . It seems whatever string can be generated by the first RE can also be generated by second and they should essentially be same. Am i missing something? (1 Reply)
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Hi Experts,
How do comeup with 1 cron expression for the same job which runs at say 1.21PM and 4.36PM daily, i know the daily and hourly part not able to get it with times other than hours (ie 1,2 etc).
thanks so much. (2 Replies)
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Hello,
I'm trying to rename a bunch of files that were named incorrectly. I know a little about regular expressions but I'm not very good at them.
Here is the image of the file names:
http://i47.tinypic.com/np2gxi.jpg
I'm trying to change the 20111116 at the beginning to 20101116 for all... (2 Replies)
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I like to loop a list of files which named file1, file2, file3, file4, etc
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echo "processing" $f
done
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Folks;
Could some one tell me what these 2 regular expressions mean:
*/(*)/*
(\d\d\d\d/\d\d/\d\d/*?) (14 Replies)
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Folks;
I have 3 questions & any help with them would be really appreciated:
If i have a list of directories, for example:
/fs/pas/2007/4/6/2634210/admdat/examin
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anyone knows what does this regular expression match for?
\(3,\).*\1.*\1 (1 Reply)
Discussion started by: metalwarrior
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8. Shell Programming and Scripting
hi
i need to wipe out something from giving path i have some thing like that :
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so it erasing me all that comes before the foo including the foo
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Hi - I am trying to ignore the following items from a list.
lp0
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lp14
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why does * highlight everything in it... shouldn't it only highlight capital letters? (0 Replies)
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ppmtosixel(1) General Commands Manual ppmtosixel(1)
NAME
ppmtosixel - convert a portable pixmap into DEC sixel format
SYNOPSIS
ppmtosixel [-raw] [-margin] [ppmfile]
DESCRIPTION
Reads a portable pixmap as input. Produces sixel commands (SIX) as output. The output is formatted for color printing, e.g. for a DEC
LJ250 color inkjet printer.
If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled. A printer control header and a color assignment table
begin the SIX file. Image data is written in a compressed format by default. A printer control footer ends the image file.
OPTIONS
-raw If specified, each pixel will be explicitly described in the image file. If -raw is not specified, output will default to com-
pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands. A raw file is often an order of magni-
tude larger than a compressed file and prints much slower.
-margin
If -margin is not specified, the image will be start at the left margin (of the window, paper, or whatever). If -margin is speci-
fied, a 1.5 inch left margin will offset the image.
PRINTING
Generally, sixel files must reach the printer unfiltered. Use the lpr -x option or cat filename > /dev/tty0?.
BUGS
Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion. If the original PPM maxval was
greater than 100, rescaling also reduces the image depth. While the actual RGB values from the ppm file are more or less retained, the
color palette of the LJ250 may not match the colors on your screen. This seems to be a printer limitation.
SEE ALSO
ppm(5)
AUTHOR
Copyright (C) 1991 by Rick Vinci.
26 April 1991 ppmtosixel(1)