8 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hello
I'm writing a script to get content of web pages on different machines and compare them using their md5 hash
hear is my code
#!/bin/bash
# Cluster 1
CLUSTER1_SERVERS="srv01:7051 srv02:7052 srv03:7053 srv04:7054"
CLUSTER1_APPLIS="test/version.html test2/version.html... (2 Replies)
Discussion started by: gtam
2 Replies
2. Shell Programming and Scripting
Hello,
I'm writing a shell script to wget content web pages from multiple server into a variable and compare
if they match return 0 or return 2
#!/bin/bash
# Cluster 1
CLUSTER1_SERVERS="srv1 srv2 srv3 srv4"
CLUSTER1_APPLIS="test/version.html test2.version.jsp"
# Liste des... (4 Replies)
Discussion started by: gtam
4 Replies
3. Shell Programming and Scripting
Hey guys,
Unfortunatley, I can not use wget on our systems....
I am looking for another way for a UNIX script to test web pages and let me know if they are up or down for some of our application.
Has anyone saw this before?
Thanks,
Ryan (2 Replies)
Discussion started by: rwcolb90
2 Replies
4. UNIX for Dummies Questions & Answers
I can't quite seem to understand what the curl command does with a web address. I tried this:
curl O'Reilly Media: Tech Books, Conferences, Courses, News
but I just got the first few lines of a web page, and it's nowhere on my machine. Can someone elaborate? (2 Replies)
Discussion started by: Straitsfan
2 Replies
5. Shell Programming and Scripting
hello. i want to make an awk script to search an html file and output all the links (e.g .html, .htm, .jpg, .doc, .pdf, etc..) inside it. also, i want the links that will be output to be split into 3 groups (separated by an empty line), the first group with links to other webpages (.html .htm etc),... (1 Reply)
Discussion started by: adpe
1 Replies
6. UNIX for Dummies Questions & Answers
Hi All!
Is this possible?
I know of several hundreds of urls linking to similar looking hp-ux man pages, like these. In these urls only the last words separated by / are changing in numbering, so we can generate these...
http://docs.hp.com/hpux/onlinedocs/B3921-90010/00/00/31-con.html... (2 Replies)
Discussion started by: Vishnu
2 Replies
7. Shell Programming and Scripting
Counts the number of hyperlinks in all web pages in the current directory and all of its sub-directories. Count in all files of type "*htm" and "*html" .
i want the output to look something like this:
Total number of web pages: (number)
Total number of links: (number)
Average number of links... (1 Reply)
Discussion started by: phillip
1 Replies
8. UNIX for Dummies Questions & Answers
Hi,
my company is considering a new development of our web site, which used to run on Apachi over Solaris.
The company who is going to do this for us knows only about developing it in ASP.
I guess this means we'll have to have another ISS server on NT for these dynamic pages :(
What are... (5 Replies)
Discussion started by: me2unix
5 Replies
pnmpsnr(1) General Commands Manual pnmpsnr(1)
NAME
pnmpsnr - compute the difference between two images (the PSNR)
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)
