06-11-2005
This looks a lot like homework, which is not allowed here.
9 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I need your expertise anyone. I'm trying to remove part of a id # in a script. Reason, the part of the id is a underscore that is making my life impossible. I simply cannot handle all the requests and modify every single one in vi or edt. So I wanted to modify the script..
For example ... (12 Replies)
Discussion started by: simon2000
12 Replies
2. UNIX for Dummies Questions & Answers
Hi guys !
I have 24 hours to learn about sendmail (as much as I can) ...
where to start ?
where to go ?
thnx, (2 Replies)
Discussion started by: Gismo
2 Replies
3. Shell Programming and Scripting
i have a file having content
a|b|c
1|2|33
4|6|55
end
a|b|d
3|4|55
end
a|b|c
45|67|98
end
so i want to print 3rd field of header a|b|c and footer end.
e.g. o/p should be
33
55
98 (7 Replies)
Discussion started by: manas_ranjan
7 Replies
4. Shell Programming and Scripting
Hello everyone, I'm new to using Linux and i am trying to create a script that will produce a list of all the files of the present working directory. So far I only have this
#!/bin/bash
cd /
ls -lt>>
I can't figure out what I am suppose to do next. (6 Replies)
Discussion started by: reecygee
6 Replies
5. Shell Programming and Scripting
#!/bin/sh
HOST='ftp.bend.com'
USER='temp1'
PASSWD='temp2'
FTPPATH='SY1:'
ifile='concat.txt'
#FTP concatenated file
ftp -n $HOST <<END_SCRIPT
quote USER $USER
quote PASS $PASSWD
binary
cd $FTPPATH
put $ifile
get $ifile retrieval.$$
quit
END_SCRIPT
if
then
echo "FTP of... (2 Replies)
Discussion started by: Sgiri1
2 Replies
6. Shell Programming and Scripting
I want to open a file which is in encrypted form and it consists Usernames and passwords.a custommized command is there to open the file.the command is exe of a shell script which takes arguments filename.
after opening with the command it will show four options which are ADD,update,search and... (2 Replies)
Discussion started by: sivaranga001
2 Replies
7. Shell Programming and Scripting
I have been using this simple grep command to extract fields from a file that ALPHANUMERIC field has been set to 16
grep -w 'ALPHANUMERIC *16' filename
------------------------- sample data file
SAMP_RICS "SAMPLE RICS" 5694 NULL ALPHANUMERIC 60 RMTES_STRING ... (11 Replies)
Discussion started by: mnassiri
11 Replies
8. Homework & Coursework Questions
can anyone help me with this???
make program ( shell script) to detect and display errors occurred in initializing a Unix system (4 Replies)
Discussion started by: dementor
4 Replies
9. Shell Programming and Scripting
I work on various messages received from server and want to write a python script that can sort messages with unique flag values and give me the output in a text file.
I get these messages in the form of .zcap file from server and I use an internal tool to filter:
Step 1) Zcap file to get... (1 Reply)
Discussion started by: Vijeta Laad
1 Replies
LEARN ABOUT ULTRIX
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)