02-06-2012
10 More Discussions You Might Find Interesting
1. Cybersecurity
Hello,
Is there a functional flow of the UNIX security system that I can view? (1 Reply)
Discussion started by: spanglerbrod
1 Replies
2. Programming
hello im facing a queer problem when i execute the foll code in unix
# include <stdio.h>
# include <unistd.h>
main(int argc,char *argv)
{
FILE *fp = fopen("/ras/chirag/fifotest/file.fifo","a");
int i=1;
fprintf(fp,argv);
printf("I SLEEP");
system("date");
for (i=0;i<50;i++)... (2 Replies)
Discussion started by: tej.buch
2 Replies
3. Programming
Any One help how to draw the flow chart for C programe ?
If any usefull link's. (1 Reply)
Discussion started by: sabari
1 Replies
4. IP Networking
I have a server I would like to disable 802.3x flow control on. The host is Linux (CentOS 4.4 x86_64 w/ 2.6.9-42.0.3.EL kernel,) and I'm using the ns83820 driver for the ethernet interface in question.
I've tried looking at the driver parameters (modinfo ns83820) and using ethtool (ethtool -a... (0 Replies)
Discussion started by: LivinFree
0 Replies
5. UNIX for Advanced & Expert Users
Hi everyone,
The script actually does the ftp and gets the file to the local system.
I want to do some manipulations for that file , But after doing ftp , script is not proceding and just a prompt is displayed .
....
ftp code here......
....................
...............
echo "FTP... (4 Replies)
Discussion started by: kaaakrishna
4 Replies
6. Programming
Hi,
my program stops with a buffer overflow error, but i can't understand the problem. I have a file like:
int array; //global variable
void func(){
int i;
for(i=0;i<n;i++)array=-1;
...
}
I had the error when i added the array initialization.
the file is a part of a C project. What... (1 Reply)
Discussion started by: littleboyblu
1 Replies
7. Shell Programming and Scripting
i am in an epic quagmire of horrid misunderstanding.
its been a while since ive been in the scene, couldnt remember my login for the account i used to have here, so excuse the 1st post. i dont want it to seem like ima post n boogy. in any case here we go:
just recently installed mandriva... (6 Replies)
Discussion started by: SirDonkeyPunch
6 Replies
8. Shell Programming and Scripting
hi ,
I am new to scripting, i have a doubt can any one pls solve it for me
the code is not working
set users = (user1 user2 user3)
echo The users are
echo $users
echo Enter the USER NAME
set USER_NAME = $<
set i = 1;
for ( i = 1; i <= $#users; i++ )
if ( $USER_NAME == $users )... (1 Reply)
Discussion started by: Manju87
1 Replies
9. Shell Programming and Scripting
In my bash script I want to say "if argument 2 is anything except x, y or z, than echo this" (x y and z being words).
So my script looks like this:
if ]
then
echo "unrecognized input: $2"
fi
This usually works but than I also want to say "if argument 2 IS x, y, or z, but argument 4 is... (4 Replies)
Discussion started by: Jrodicon
4 Replies
10. Emergency UNIX and Linux Support
I am trying to get an output using the command
tcpdump -w /tmp/syn.pcap 'tcp & (tcp-syn) != 0'
But I am getting the error:
tcpdump: no suitable device found
Is there an alternate command to achieve this? (4 Replies)
Discussion started by: ggayathri
4 Replies
LEARN ABOUT REDHAT
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)