01-09-2012
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi,
I need to prompt for a response from a user to enter a path
read dest_dir?"Please Enter Directory :"
How do I do this until a valid directory is entered by the user. I can use
to check the existence of the directory. However when I try the following I cannot get it to work.
while ... (2 Replies)
Discussion started by: jerardfjay
2 Replies
2. Shell Programming and Scripting
I'm trying to write a script that identifies whether a directory of the form AWL.????????.IP exists. I have one that exists which is AWL.05301032.IP.
When I test like this: If ]
I get true, but when I test like this:
If ]
Or like this
If ]
Or any other variation of wild cards, I... (4 Replies)
Discussion started by: philplasma
4 Replies
3. UNIX for Dummies Questions & Answers
Hi.
I what to write a make file that inside a target I want to check if a directory exists.
some like:
### make
a:
if ;then
<command 1>
else
<command 2>
fi
### make end
Thanks a lot
---------------------- (2 Replies)
Discussion started by: zivsegal
2 Replies
4. Shell Programming and Scripting
Hello:
Can someone please help me figure out what is wrong here, my script does not move on to the "else" part even though there is no .ssh directory on my remote server:
$more putkey.sh
#!/bin/ksh
for server in `cat list`
do
if ; then
cat $HOME/.ssh/id_rsa.pub |ssh $server ' cat >>... (4 Replies)
Discussion started by: Sara-sh
4 Replies
5. Shell Programming and Scripting
Hey guys im trying to check if the directory exists
i get a syntax error on the elif statement iv tried using else and still same result im not sure. If the directory does not exist can i just insert mkdir /tmp/old under the elif once that part gets working
if ; then
#do nothing
elif
echo... (20 Replies)
Discussion started by: musicmancanora
20 Replies
6. Shell Programming and Scripting
cp $PATHLOGS/$DATE/*.* $TMP/logs_tmp/
cp $PATHLOGS/$DATE1/*.* $TMP/logs_tmp/
Before copying the files I have to check if the directory $DATE1 and $DATE2 exists.
If directory exists then, check if the folder contains some files.
if the file exists then, check if the file size is greater... (3 Replies)
Discussion started by: sandy1028
3 Replies
7. Shell Programming and Scripting
Hi,
I am using solaris 10 OS and bash shell.just checking for small code snippet which follows below.
/export/home/vomappservers/spa/common/5.0
/export/home/vomappservers/spa/common/scripts
/export/home/vomappservers/spa/tools
/export/home/vomappservers/spa/scm5.0/SCCS... (5 Replies)
Discussion started by: muraliinfy04
5 Replies
8. Shell Programming and Scripting
Hi Gurus,
I have a requests to find if all the file in the filelist exist in certain directory.
example:
my filelist
abc
def
ddd
cde
afg
how can I find these 5 files exists at director /home/abc
Thanks in advance (7 Replies)
Discussion started by: ken6503
7 Replies
9. Shell Programming and Scripting
Hi guys,
I am beginner trying to learn unix. So any help is welcomed.
My requirement is to check whether is a file exists in a particular directory or not.
The directory path and filename are taken dynamically with user interaction. So the program should continue only if the $filename... (1 Reply)
Discussion started by: maris_markur
1 Replies
10. UNIX for Beginners Questions & Answers
There are some files with suffix dates like abc_20032019.dat abc_17032019.dat
If at least one file exists then perform some operation else exit from execution.
Korn shell
----------------------------------
array=($inputdir/abc*.dat)
If ] ]
then
echo " file exits"
else
echo " file does... (10 Replies)
Discussion started by: Rajesh123
10 Replies
LEARN ABOUT OSF1
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)