Hi all
How can I make Emacs to show the line numbers at the left or right as a default. This might help me to quickly jump to a given line.
Thanks
SS (9 Replies)
Hi,
I need a command that would let ls show number of lines in each file rather than file size in KBs.
I tried using wc -l as a source of input to ls but I found a problem cutting the file name since wc generates a space delimited list.
Any suggestions?
Thanks.
GmMike. (1 Reply)
Hello all
Im trying to write one liner that will show me results only if the result of the expression is greater then 0
For example:
I do :
find . -name "*.dsp" | xargs grep -c SecurityHandler
the result are :
./foo/blah/a.dsp:0
./foo/blah1/b.dsp:1
./foo/blah2/c.dsp:2... (1 Reply)
I have two files and I need to know the difference between each line. This will extend to thousand lines and manual works is really not really an option.
sample:
First File Second File
allan entry1 entry2 entry3 allan entry1 entry3
bob entry1... (10 Replies)
I'm investigating an issue where rsync's to an AIX server will sometimes fail. I suspect the problem might be due to the number of simultaneous SSH connections being made to the host dropping the rsync attempts. I'd like to view the number of open ssh connections. The who command will list logged... (1 Reply)
Hello Guys,
I have created function which is as follow:
tail -f filename |grep "Key word"
output from this command
19-11-2011 21:09:15,234 - INFO Numbement - error number:result = :11
19-11-2011 21:09:15,286 - INFO Numbement - error number:result = :11
19-11-2011 21:09:15,523 - INFO... (5 Replies)
Hi Power User,
I'm trying to compute this kind of text file format:
file1:
jakarta 100 150
jakarta 170 210
beijing 220 250
beijing 260 280
beijing 290 320
new_york 330 350
new_york 370 420
tokyo 430 470
tokyo 480 ... (2 Replies)
Hi all,
I have a requirement to calculate the difference of number of days of time stamp of a file and system date and if the difference is greater than 15 days it should prompt as previous month file otherwise current month file.
Below is the code i used and it is working fine till now. (You... (2 Replies)
Hi,
I have date format like 09/08/115(Format : date +%m%d%1y) and i want to differentiate this date with current date and output of difference will compare with a number like
if ; then
commands
else
exit
fi
how can i do that (2 Replies)
Hi
I wanted to know if there is an option in grep command to show the number of results (not the number of lines of findings).
Thanks (14 Replies)
Discussion started by: abdossamad2003
14 Replies
LEARN ABOUT DEBIAN
pnmpsnr
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)