A common thing in shell scripting. I came across this script that will be useful for people learning to write script.
#!/usr/bin/ksh
#
# SCRIPT: 12_ways_to_parse.ksh.ksh
#
#
# REV: 1.2.A
#
# PURPOSE: This script shows the different ways of reading
# a file line by line. Again... (0 Replies)
How many ways are there to open a file in unix?
wha i know is mentioned below
suppose if xx is a filename, then
1) cat xx
2) more xx
3) view xx
4) less xx
I heard there are seven ways to open a file. If so, can anyone tell me all the ways to open a file and correct me the above... (3 Replies)
Hi!
I really need your help!
I need to operate the columns separate by ',' of a file with this structure
a1,a2,a3
b1,b2,b3,b4,b5
c1,c2
d1,d2,d3
e1
....
and I want the result of this subtractions
a1-a1,a2-a1,a3-a1
b1-b1,b2-b1,b3-b1,b4-b1,b5-b1 (10 Replies)
How does X windows system launch a program?
Does X give init a command (fork) or does x give BASH a command? Can/does X interact with init directly or does everything go through BASH? :wall:
Thanks in advance! (4 Replies)
Hello, I need some help to correct my algorithm steps to sum a number. I am confused... please input some steps
Example:
Let's say a number 5.
Now we can get a list of numbers: 1, 2, 3, 4 (less than 5 in sorted order).
so the sum could be: 1+4; 2+3 ( 1+1+1+1+1 or 1+2+2 is not a solution).
... (1 Reply)
Hi I am trying to make my scripts to run from any directory and after some research (googling) I find there are 2 ways to do this
1. export PATH=$PATH:directory
2. create a /bin directory in your home directory and put your scripts there.
Could someone tell me the relative merits of either... (1 Reply)
Okay so I'm 13 and my dad set me a challenge of writing a program that check to see if a box is online with input parameter when starting the program so i came back with this.The top commented out bit is what he showed me how to do after i show him my code.
#!/bin/sh
#in=${@}
#tst=`echo... (3 Replies)
Discussion started by: mattylad000
3 Replies
LEARN ABOUT MINIX
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)