01-08-2004
9 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
I'm getting curious about making some of my own commands. I know this is realtively easy with script files and combining various unix standard commands. Is there a way to view the code that is used for these standard commands..i.e. how do I see what code is used for the 'join' command.
I'm... (2 Replies)
Discussion started by: peter.herlihy
2 Replies
2. UNIX for Dummies Questions & Answers
Is there an easy way to print to a pdf file in Unix? Now I'm using lpr command to print to a network printer , but I need to have a pdf version of the file as well! Can someone help me?
-Rune (2 Replies)
Discussion started by: runeho
2 Replies
3. UNIX for Dummies Questions & Answers
Hi,
Im newbie here and in unix as well. How can i view users in unix? Im viewed them in shadow file (i typed: vi /etc/shadow) but some unix (im confused if its unix or linux or bsd, but i think it has a little thing in common or differnce) has no shadow file?! What must i do to view the users... (6 Replies)
Discussion started by: jerome
6 Replies
4. UNIX for Advanced & Expert Users
Guys,
Could anyone let me know, how we can see the contents of .tar file without extracting it.
I know the extracting and combine options
Regards (3 Replies)
Discussion started by: sdosanjh
3 Replies
5. UNIX for Advanced & Expert Users
Hi,
I had a PDF file in Windows, I ftp'ed it to UNIX environment. Now, I couldnot read the same file in the UNIX environment. Is there any possible way to read this file? I need to give this file as input
Thanks,
Geetha (4 Replies)
Discussion started by: iamgeethuj
4 Replies
6. Shell Programming and Scripting
This is a simple example of a shell script. I made it because it's sometimes convenient to search through a manpage and to have access to the terminal while you're reading (maybe to test code).
It also serves as a basic example for anyone learning shell scripting.
#!/bin/sh
nm="/tmp/$1.pdf"... (0 Replies)
Discussion started by: CRGreathouse
0 Replies
7. Shell Programming and Scripting
Hi Experts,
I have a requirement where i need to setup a batch job which runs everymonth and move the pdf files from unix server to windows servers.
Could some body provide the inputs for this.
and also please provide the inputs on how to map the network dirve in the unix like that... (1 Reply)
Discussion started by: ger199901
1 Replies
8. UNIX for Dummies Questions & Answers
on a PROGRESS environment, i create an invoice which at printing it must generate both the .dat for the invoice that was sent to the printer and the .dat for the PDF version. we have never printed PDF files in our lp printer until recently. i've done a bit of googling and it comes down to that i... (2 Replies)
Discussion started by: pdf2ps
2 Replies
9. Shell Programming and Scripting
Hi to all,
1- I'm trying to open a certain file in unix with the tool KEA!
2- i get to the correct folder with the CD command
3- Once in the correct directory i try the following unix command:
vi NameOfFile.Z
4- Yes those files finish with a .Z
5 - I get something in the KEA!... (3 Replies)
Discussion started by: Sanchoniathon
3 Replies
LEARN ABOUT SUNOS
pbmreduce
pbmreduce(1) General Commands Manual pbmreduce(1)
NAME
pbmreduce - read a portable bitmap and reduce it N times
SYNOPSIS
pbmreduce [-floyd|-fs|-threshold ] [-value val] N [pbmfile]
DESCRIPTION
Reads a portable bitmap as input. Reduces it by a factor of N, and produces a portable bitmap as output.
pbmreduce duplicates a lot of the functionality of pgmtopbm; you could do something like pnmscale | pgmtopbm, but pbmreduce is a lot
faster.
pbmreduce can be used to "re-halftone" an image. Let's say you have a scanner that only produces black&white, not grayscale, and it does a
terrible job of halftoning (most b&w scanners fit this description). One way to fix the halftoning is to scan at the highest possible res-
olution, say 300 dpi, and then reduce by a factor of three or so using pbmreduce. You can even correct the brightness of an image, by
using the -value flag.
OPTIONS
By default, the halftoning after the reduction is done via boustrophedonic Floyd-Steinberg error diffusion; however, the -threshold flag
can be used to specify simple thresholding. This gives better results when reducing line drawings.
The -value flag alters the thresholding value for all quantizations. It should be a real number between 0 and 1. Above 0.5 means darker
images; below 0.5 means lighter.
All flags can be abbreviated to their shortest unique prefix.
SEE ALSO
pnmenlarge(1), pnmscale(1), pgmtopbm(1), pbm(5)
AUTHOR
Copyright (C) 1988 by Jef Poskanzer.
02 August 1989 pbmreduce(1)