11-03-2011
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
There is an error when i am trying to use the shift command in this way:
($1 = -d, $2 = 123, $3 = -c etc etc)
for $arg in $@
do
case $arg in
"-d") shift; (so that the $2 will become the $arg now)
(and while it loop the 2nd time,)
... (1 Reply)
Discussion started by: AkumaTay
1 Replies
2. UNIX for Dummies Questions & Answers
hi all, when I press SHIFT at once it work like as
I've hold it (like CapsLock is On, but it Off) ! ... and if I press F1 (or another
function key) it put out 24z :(
it is occure on my remote sun 8 , xterm session
help me please ! (2 Replies)
Discussion started by: oneivan
2 Replies
3. Shell Programming and Scripting
Hi Folks,
In shell scripting the maximum no. of command line parameters becomes 9(Am i right). If we want to get more than 9 parameters we use the shift command.
Even here there are two possibilities.
1. Without the use of variables - The arguments are lost and the lost no. is equal to the... (6 Replies)
Discussion started by: Nisha
6 Replies
4. Shell Programming and Scripting
I am running a program where in I have this command
which is giving error the shift: number is not correct.
can you please tell me how shift actually works?
the line which is giving error is-
set $PARAM; shift; shift; shift; shift; shift; shift; shift; shift
Is it related somewhere to... (2 Replies)
Discussion started by: shrao
2 Replies
5. UNIX for Dummies Questions & Answers
Hi,
I wrote one script, in between script needs to use 10th and 11th positional parameters, that time i used "shift". Here i am facing the below find problem,
./DataCount.sh: cannot shift
I tried
1) I have read man pages for shift
2) Before but * and **
3) Simple shift with out giving... (4 Replies)
Discussion started by: Nagapandi
4 Replies
6. Shell Programming and Scripting
I would need the awk command or a better way to get my file that looks like
1234
5678
8912
3456
7890
to look like
1234,5678,8912,3456,7890
Thanks in advance (4 Replies)
Discussion started by: bombcan
4 Replies
7. UNIX for Dummies Questions & Answers
Hi,
Firstly, I did a search for this question both on this site and on the internet and have not been able to find a suitable answer that is not general in nature.
I have always been a Windows user. I use my girl friend's mac every now and then, but I always come back to windows. For a... (1 Reply)
Discussion started by: mearex
1 Replies
8. UNIX for Dummies Questions & Answers
think using shift would help me finish my script but cant get it work without your help. would appreciate if you give me a example with shift & counter in the same script so I can later work on that to my one.
Thanks and Good Luck! (1 Reply)
Discussion started by: me.
1 Replies
9. Shell Programming and Scripting
Hello,
I am reading one of the AIX manuals about shell scripting and (AIX 5) and I found this example when introducing to functions:
function usage
{
prog="$1"; shift
print -u2 "$prog: usage: $prog $@"
exit 1
}
This example is meant to be easy but I don't understand what it is... (5 Replies)
Discussion started by: Kibou
5 Replies
10. Shell Programming and Scripting
#!/bin/bash
hostname=$1; shift
for hostname in $1
do
ping $hostname
done
I want to run the above script as hostname.sh yahoo.com google.com cnn.com. I want to shift each hostname to $1. How can do that with above code as currently it's not shifting. (5 Replies)
Discussion started by: scj2012
5 Replies
LEARN ABOUT FREEBSD
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)