03-01-2016
Not clear. What exactly is the problem? What's the difference between your command and your script?
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1. Shell Programming and Scripting
Hi
i have a file which have a pattern like this
Nov 10 session closed
Nov 10 Nov 9 08:14:27 EST5EDT 2010 on tty .
Nov 10 Oct 19 02:14:21 EST5EDT 2010 on pts/tk .
Nov 10 afrtetryytr
Nov 10 session closed
Nov 10 Nov 10 03:21:04 EST5EDT 2010
Dec 8 Nov 10 05:03:02 EST5EDT 2010
... (13 Replies)
Discussion started by: Himanshu_soni
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2. Shell Programming and Scripting
Hello All,
I have a file which is having below type of data,
Jul 19 2011 | 123456
Jul 19 2011 | 123456
Jul 20 2011 | 123456
Jul 20 2011 | 123456
Here I wanted to grep for date pattern as below, so that it should only grep "Jul 20" OR "Jul ... (9 Replies)
Discussion started by: gr8_usk
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3. Shell Programming and Scripting
Hi
I am facing the below problem.
I have set of lines in which i have to search for only the line which matches with the pattren "/" only.
input:-
/*+ some text */
/*+ some text */
/* Remove rows from a table of survey results. */
/* Add a survey respondent's name and answers. */
/*... (7 Replies)
Discussion started by: manasa_vs
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4. Shell Programming and Scripting
Let me give you a complete example what I am trying to achieve.
1. Below is the log file structure where I need 2,5 and 14th column of the logs after grepping through the linkId=1ddoic.
Log file structure:-
abc.com 20120829001415 127.0.0.1 app none11111 sas 0 0 N clk Mozilla/5.0... (3 Replies)
Discussion started by: kmajumder
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5. Shell Programming and Scripting
Hi,
I writing a shell program to remove the data from output of the find which matches a list in a file
I am using the below find command to get the list of files
x=`find . -name test*.dat`
the output of the find command is as follows
test1.dat
test2.dat
test3.dat
test4.dat... (4 Replies)
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6. Shell Programming and Scripting
Hi,
I am trying to do pattern search using grep command. But i donot know what mistake i'm doing. I am not getting the expected Result. could any one please help me out?
$ cat b.ksh
AasdjfhB
57834B
86234B
472346B
I want to print the line which is starting with either A or 8 and... (10 Replies)
Discussion started by: nikesh29
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7. Shell Programming and Scripting
I am facing a problem while using the grep command in shell script. Actually I have one file (PCF_STARHUB_20130625_1) which contain below records.
SH_5.55916.00.00.100029_20130601_0001_NUC.csv.gz|438|3556691115
SH_5.55916.00.00.100029_20130601_0001_Summary.csv.gz|275|3919504621 ... (2 Replies)
Discussion started by: sumit.vedi1988
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8. Shell Programming and Scripting
Hi,
How can I use find command to search string/pattern in a file recursively?
What I tried:
find . -type f -exec cat {} | grep "make" \;
Output:
grep: find: ;: No such file or directory
missing argument to `-exec'
And this:
find . -type f -exec cat {} \; -exec grep "make" {} \;... (12 Replies)
Discussion started by: cola
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9. Shell Programming and Scripting
One more question:
I want to grep "COS_12_TM_4 pattern from a file look likes :
"COS_12_TM_4" " ];I am taking scan_out as the input from the user.
How to search "COS_12_TM_4" in the file which is corresponds to scan_out (12 Replies)
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10. UNIX for Beginners Questions & Answers
I have this fileA
TEST FILE ABC
this file contains ABC;
TEST FILE DGHT this file contains DGHT;
TEST FILE 123
this file contains ABC,
this file contains DEF,
this file contains XYZ,
this file contains KLM
;
I want to have a fileZ that has only (begin search pattern for will be... (2 Replies)
Discussion started by: vbabz
2 Replies
LEARN ABOUT REDHAT
pnmpsnr
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)