Ubuntu strange behavior Post: 302399464

9 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Strange Behavior on COM2

Hi, I have a problem with a new touch screen controller that I am trying to use on a SCO 3.0 system. THe touch screen controller only wants to talk at 9600baud. I have updated /etc/inittab per the manual and also edited /usr/lib/event/devices to use 9600 baud. The only way I can get the...

2. Shell Programming and Scripting

Very Strange Behavior for redirection

I have searched far and wide for an explanation for some odd behavior for output redirection and haven't come up with anything. A co-worker was working on old scripts which have run for years and embedded in their code were output redirects which worked for the script during execution and then...

3. Shell Programming and Scripting

nawk strange behavior

Dear guys; when deleting repeated lines using nawk as below ; Why the below syntax works? nawk ' !a++' infile > outfile and when using the other below syntax the nawk doesn't work? nawk ' { !a++ } ' infile > outfile or nawk ' { !a++ } ' infile > outfile BR

4. Programming

Strange behavior in C++

I have the following program: int main(int argc, char** argv){ unsigned long int mean=0; for(int i=1;i<10;i++){ mean+=poisson(12); cout<<mean<<endl; } cout<<"Sum of poisson: "<< mean; return 0; } when I run it, I get the...

5. Red Hat

strange mail behavior

Hi I have script to to take backup and send mail to a group once a day. One strange behavior I have observed recently is that most of the time the mail we receive is fine . But someday it just sends out mail without any subject with undisclosed recipients. I dont know how to find the cause...

6. Shell Programming and Scripting

Strange behavior on one of my server

I am not sure what is wrong, but I have some strange behavior when printing things out. I do create a file with only one word test, no space, no new line etc. nano file<enter> test<ctrl x>y<enter> Server 1 gets (fail) awk '{print "+"$0"*"}' file *test Server 2 gets (OK) awk '{print...

7. AIX

Strange behavior with tar

I am trying to create an archive using tar. I am specifying a list of directories using the -L option. For testing purposes I created a simple directory structure: /backup/test /backup/test/test1 /backup/test/test2 The file specified by the -L option, named files.txt, contains:...

8. Shell Programming and Scripting

Strange behavior of grep

Hi All, I am facing a strange problem while grepping for a process. Here is the small script that i have written. It will look for any process running with the parameter passed to the script. If no process is running it should print appropriate message. $ cat t.ksh #!/bin/ksh set -x ...

9. Shell Programming and Scripting

Strange Ctrl+C behavior

Hello All, I have a strange issue. I've created a shell script which connects to RMAN (Oracle Recovery Manager) and executes full DB backup. I then executed this script with nohup and in the background: $ nohup my_script.sh > logfile.log 2>&1 &The issue is that when I tried to take a look into...

LEARN ABOUT CENTOS

idiff

IDIFF(1)                                                      General Commands Manual                                                     IDIFF(1)

NAME

       idiff - compare two images

SYNOPSIS

       idiff [options] image1 image2

DESCRIPTION

       The idiff utility is invoked as follows:

       idiff [options] image1 image2

       Where  input1  and  input2  are  the  names of two image files that should be compared. They may be of any format recognized by OpenImageIO
       (i.e., for which image-reading plugins are available).

       If the two input images are not the same resolutions, or do not have the same number of channels, the comparison will return FAILURE  imme-
       diately and will not attempt to compare the pixels of the two images. If they are the same dimensions, the pixels of the two images will be
       compared, and a report will be printed including the mean and maximum error, how many pixels were above the warning and failure thresholds,
       and whether the result is PASS, WARNING, or FAILURE. For example:

       $ idiff a.jpg b.jpg
       Comparing "a.jpg" and "b.jpg"
         Mean error = 0.00450079
         RMS error = 0.00764215
         Peak SNR = 42.3357
         Max error = 0.254902 @ (700, 222, B)
         574062 pixels (82.1%) over 1e-06
         574062 pixels (82.1%) over 1e-06
       FAILURE

       The  "mean  error"  is the average difference (per channel, per pixel). The "max error" is the largest difference in any pixel channel, and
       will point out on which pixel and channel it was found. It will also give a count of how many pixels were above  the  warning  and  failure
       thresholds.

       The  metadata of the two images (e.g., the comments) are not currently compared; only differences in pixel values are taken into considera-
       tion.

       For a complete description, see /usr/share/doc/libopenimageio-dev/openimageio.pdf.gz.

OPTIONS

       --help Print help message

       -v     Verbose status messages

       -a     Compare all subimages/miplevels

   Thresholding and comparison options
       -fail %g
              Failure threshold difference (0.000001)

       -failpercent %g
              Allow this percentage of failures (0)

       -hardfail %g
              Fail if any one pixel exceeds this error (infinity)

       -warn %g
              Warning threshold difference (0.00001)

       -warnpercent %g
              Allow this percentage of warnings (0)

       -hardwarn %g
              Warn if any one pixel exceeds this error (infinity)

       -p     Perform perceptual (rather than numeric) comparison

   Difference image options
       -o %s  Output difference image

       -od    Output image only if nonzero difference

       -abs   Output image of absolute value, not signed difference

       -scale %g
              Scale the output image by this factor

SEE ALSO

       iconvert(1), igrep(1), iinfo(1), iprocess(1), iv(1), maketx(1), oiiotool(1).

AUTHOR

       OpenImageIO was written by Larry Gritz and the other authors and contributors.

       This manual page was written by IRIE Shinsuke <irieshinsuke@yahoo.co.jp>, for the Debian project (and may be used by others).

                                                                   May 19, 2012                                                           IDIFF(1)