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Shell Programming and Scripting
Need to understand how the line in perl program works as shell commend
Post 302997197 by digioleg54 on Tuesday 9th of May 2017 01:18:05 PM
05-09-2017
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10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Now I am just getting frustrated and confused... if anyone has some advice on how this anomoly is occurring I would greatly appreciate it.
cat helpme.txt | awk 'NR<5{printf("%-20s %-20d %-20d %-20.1f\n","hello",$1,$2,$3)}' | sort -rk4
This line works fine in solo - reads the three fields from... (4 Replies)
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2. Shell Programming and Scripting
Hello ,
I want to run some shell scripts in my perl script. I need to read the script's name from a file ( this file includes the name of all the scripts) and run the script one by one.. Please let me know how to go ..
Thanks in advance,
Radha (5 Replies)
Discussion started by: s123.radha
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How to call a perl script in shell program / shell scripting.
PLS HELP ME (2 Replies)
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4. Shell Programming and Scripting
so in unix this command works works and shows me a list of directories
find . -name \*.xls -exec dirname {} \; | sort -u | > list.txt
but when i try running a perl script to run this command
my $query = 'find . -name \*.xls -exec dirname {} \; | sort -u | > list.txt';... (2 Replies)
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5. Shell Programming and Scripting
Hi is there a way that i can convert this simple perl program into shell script
#!usr/bin/perl -w
use strict;
use warnings;
open INPUTFILE, "uniqprobecoordinates.out" || die "canot open the file $!";
open OUTPUTFILE, ">", "1_4reads.out";
while(<INPUTFILE>)
{
chomp;
... (3 Replies)
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6. Shell Programming and Scripting
Hi, the following command works in the terminal no problem.
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Please help me understand how sort -k3,3 -k 4,4 short* works , is it sorting 3 and 4 th field ? what is the use of specifying 3,3 and 4,4 in sort and what is actually does and i see sort -k3 short* and sort -k3,3 -k 4,4 short* giving the same output.
Sort output attached
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8. Programming
co
#! /usr/bin/perl
use strict;
use warnings;
use diagnostics;
my $amount=""; my $bain; ; my $code="";
my $date;my $day;my $line; my $mo; my $LNUM = 0;
my $xyz=""; my $yr;
$yr = 2015;
my $F; my @F;
while (<>) {
chop;
++$LNUM;
@F = split(';');
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9. Shell Programming and Scripting
I wish to replace "\\n" with a single white space.
The below does the job on command-line:
$ echo '/fin/app/scripts\\n/fin/app/01/sql' | sed -e 's#\\\\n# #g';
/fin/app/scripts /fin/app/01/sql
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10. Shell Programming and Scripting
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LEARN ABOUT OSX
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)