03-23-2016
Is this a homework assignment?
If it is not a homework assignment, please explain why it is useful to create three files containing (collectively) six copies of a sixteen lines of text from one file containing three identical copies of sixteen lines of text.
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I've refined the filesystem size using awk and directed to a file name.
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$cat numbers
345
543
23423456
44435
546
.
.
how do you write a script to all these numbers to get the total?
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2. Shell Programming and Scripting
I have an input file with contents like:
MainFile.dat:
12247689|7896|77698080
16768900|hh78|78959390
12247689|7896|77698080
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12247689|7896|77698080
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Hi All,
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hdr=$(cut -c1 $path$file|head -1)#extract header”H”
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Example
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Hello,
I have some large text files that look like,
putrescine
Mrv1583 01041713302D
6 5 0 0 0 0 999 V2000
2.0928 -0.2063 0.0000 N 0 0 0 0 0 0 0 0 0 0 0 0
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Hi ,
I am having a scenario where I need to split the file based on two field values. The file is a fixed length file.
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AA0998703000000000000190510095350019500010005101980301
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LEARN ABOUT REDHAT
ppmtosixel
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)