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1. Shell Programming and Scripting
Hi
i want to redirect a list of ftp file to an exsisting file by
mls x.txt mylocalfile.txt
result of this command corrupt my data on mylocalfile.txt , please help me (2 Replies)
Discussion started by: rezasadeghi
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2. UNIX for Dummies Questions & Answers
Hi,
when I do cat for kernel parameters
cat /proc/sys/kernel/sem >> /etc/sysctl.conf
4096 4096 32 128
The above command working with out any doubt
but I want to pass it like below, need to append "kernel.sem =" and pass it to /etc/sysctl.conf kernel.sem = 4096... (2 Replies)
Discussion started by: stew
2 Replies
3. Shell Programming and Scripting
I have a script to send an email like below. Problem is, the if ..fi block is not getting executed, and is coming as a part of the email body. Can anyone take a look at this? :confused:
Log file shows this:
SEND_MAIL.prog: line 64:
: command not found
echo "Input Parameters"
echo... (11 Replies)
Discussion started by: mansmaan
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4. Shell Programming and Scripting
How do i send the output from the date command to a variable called today easy:
today=$(date) but how can the output be capitalized on a single command ? (2 Replies)
Discussion started by: JuankyKong
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5. Web Development
Just want to give a background. Currently, our company web site is redesigned and there are about 200 current URLs will have new redirects. I don't want to enter them in the config file rather would like to have them in a text file/config file and referring the file from the config whenever the... (2 Replies)
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6. Shell Programming and Scripting
Hi,
I have perl script which is calling an external command using "system()" with argument.
But i am not able to capture the output.Even tried with backtick also with no luck.
.
.
$number=<>;
system ("cmd $number >output.txt"); (2 Replies)
Discussion started by: rasingraj
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7. UNIX for Dummies Questions & Answers
Hi
I have a working sendmail setup for my domain, but would like to run a subdomain on another machine. I could try below, but its a production server and worry about messing it up. Hence the question.
So I have machine names:
mydomain.com (mail server)
dev.mydomain.com
currently the... (1 Reply)
Discussion started by: gtrava01
1 Replies
8. Shell Programming and Scripting
Hi all, I have a script which call a java program, the logging (to log file) in the program is done using log4j. However, as a safety measure, i still choose to direct standard error to another log file as follow
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Discussion started by: mpang_
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9. UNIX for Dummies Questions & Answers
Hello all!
Does anyone know how to redirect i link to a host or alias name?
Here is the example:
i wank to type "Bob" in my browser and be redirected to
http://192.168.54.37:7001/Bob/BobMainServlet on that perticular port.
Im using Redhat 6.2 with bind 9.2.3
regards...
dOzY (4 Replies)
Discussion started by: dozy
4 Replies
10. IP Networking
I'm sittig behind a firewall that doesn't allow ftp. I have a conection to a UNIX system, connecting throug SSH. Is it possible to redirect the ftp through the UNIX to my computer? (1 Reply)
Discussion started by: <Therapy>
1 Replies
pnmpsnr(1) General Commands Manual pnmpsnr(1)
NAME
pnmpsnr - compute the difference between two portable anymaps
SYNOPSIS
pnmpsnr [pnmfile1] [pnmfile2]
DESCRIPTION
Reads two PBM, PGM, or PPM files, or PAM equivalents, as input. Prints the peak signal-to-noise ratio (PSNR) difference between the two
images. This metric is typically used in image compression papers to rate the distortion between original and decoded image.
If the inputs are PBM or PGM, pnmpsnr prints the PSNR of the luminance only. Otherwise, it prints the separate PSNRs of the luminance, and
chrominance (Cb and Cr) components of the colors.
The PSNR of a given component is the ratio of the mean square difference of the component for the two images to the maximum mean square
difference that can exist betwee any two images. It is expressed as a decibel value.
The mean square difference of a component for two images is the mean square difference of the component value, comparing each pixel with
the pixel in the same position of the other image. For the purposes of this computation, components are normalized to the scale [0..1].
The maximum mean square difference is identically 1.
So the higher the PSNR, the closer the images are. A luminance PSNR of 20 means the mean square difference of the luminances of the pixels
is 100 times less than the maximum possible difference, i.e. 0.01.
SEE ALSO
pnm(5)
04 March 2001 pnmpsnr(1)