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1. Shell Programming and Scripting
Hi,
I have a csv file which contains some millions of lines in it.
The first line(Header) repeats at every 50000th line. I want to remove all the duplicate headers from the second occurance(should not remove the first line).
I don't want to use any pattern from the Header as I have some... (7 Replies)
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2. UNIX for Dummies Questions & Answers
I have a file with following data
A
B
C
I would like to print like this n times(For eg:5 times)
A
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A
B
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A
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A (7 Replies)
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hello all
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Hi,
I copied the contents of a binary file into a .text file using hd (hexdump) command. The data in binary file is such that I get in many places like following
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5. Shell Programming and Scripting
Hey guys, need some help to fix this script. I am trying to remove all the duplicate lines in this file.
I wrote the following script, but does not work. What is the problem?
The output file should only contain five lines:
Later! (5 Replies)
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Hi All,
I have a very huge file (4GB) which has duplicate lines. I want to delete duplicate lines leaving unique lines. Sort, uniq, awk '!x++' are not working as its running out of buffer space.
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I have a log file "logreport" that contains several lines as seen below:
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Hi,
I am having a file which contains many duplicate lines. I wanted to redirect these duplicate lines into another file.
Suppose I have a file called file_dup.txt which contains some line as
file_dup.txt
A100-R1
ACCOUNTING-CONTROL
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Hi,
I have a file with duplicate lines in it. I want to keep only the duplicate lines and delete the non duplicates. Can some one please help me?
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Narayana Gupta (3 Replies)
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I am doing KSH script to remove duplicate lines in a file. Let say the file has format below.
FileA
1253-6856
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1827-1356
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1822-1157
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1000-1410
1822-1231
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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)
