For example, I have a file called number.txt.
And I want to print out the value of x and y, if y%4==0 and the next value of y%4==0. Thus, the sample output is:
Can someone do this in perl script? Thank you
Hi,
how can i print the previous, current and next line using sed?
current line is the matching line.
The following prints all lines containing 'Failure' and also the immediate next line
cat $file | sed -n -e '/Failure/{N;p;}'
Now, i also want to print the previous line too.
Thanks,... (8 Replies)
hi,
i am new to this site.
i want to write a script to compare the file size of the files in the current dir with the files in the previous directory.
the files name will be same, but the filename format will be as xyzddddyymm.txt. the files will arrive with the month end date(i want to... (5 Replies)
Hello,
Can anybody help me to correct my sed syntax to find the string and print previous two lines and current line and next one line.
i am using string as "testing"
netstat -v | sed -n -e '/test/{x;2!p;g;$!N;p;D;}' -e h
i am able to get the previous line current line next line but... (1 Reply)
Hi guys,
I have found your forum super useful. However, right now I am stuck on a seemingly "simple" thing in AWK. I have two columns of data, the first column in Age (in million years) and the second column is Convergence Rate (in mm/yr).
I am trying to process my data so I can use it to... (2 Replies)
Hi,
I have one small doubt how to go ahead and process the below requirement.
File Content
1,abc,10
2,xyz,11
3,pqr,12
4,pqr,13
5,pqr,14
Output file expected:
1,mnq,1
1,ddd,2
1,qqq,3
1,sss,4
1,ddd,5
1,eee,6
1,fff,7
1,ddr,8
1,rrd,9 (3 Replies)
Hi,
I am currently trying to work out how to compare one line with the last line I have read in via ksh. I have a file which has sorted output from a previous sort command so all the lines are in order already and the file would look something like show below. Each line has a name and a time... (5 Replies)
I need to read the contents of a file. Then I need to grep for a keyword and replace part of the grepped line based on the condition of previous and present line.
Example input file:
V {
port1 = P;
port2 = 0;
shift_port = P0; /* if next shift_port is P0 I need... (9 Replies)
Hey,
I am trying to compare formated login and logout dates from one user at a host which I have stored in a tmp directory in order to find out the total login time. I need to compare them in order to find overlapping intervals.
At first I tried to store each log in and logo date in an array... (3 Replies)
Hi scripters,
I'm quite used to run commands in the background using & like in:
$ myscript &But this is NOT what I'm trying to do today. What I'm trying to achieve is to run a script the normal way (without &), have my script do a little checkup and then jump to background. Something like:... (5 Replies)
Hi,
Suppose I have a command:$ cmd1 | cmd2I need to send a message from cmd2 to cmd1 when I receive some a certain message from cmd1. How to do this?
I think that I have to know cmd1's PID and then in cmd2 send a message to this PID. How? (24 Replies)
Discussion started by: JackK
24 Replies
LEARN ABOUT DEBIAN
empty-page
EMPTY-PAGE(1) ExactImage Manual EMPTY-PAGE(1)NAME
empty-page - empty page detector of the ExactImage toolkit
SYNOPSIS
empty-page [option...] {-i | --input} input-file
empty-page {-h | --help}
DESCRIPTION
ExactImage is a fast C++ image processing library. Unlike many other library frameworks it allows operation in several color spaces and bit
depths natively, resulting in low memory and computational requirements.
empty-page counts dark pixels of a black and white image and decides with a threshold whether the page is most probably empty, and thus can
be removed from the image processing stream.
OPTIONS -i file, --input file
Read image from the specified file.
-m n, --margin n
Set width of border margin to skip. For speed reasons, the margin has to be a multiple of 8. The default is 16.
-p x, --percentage x
Set fraction of permissible dark pixels. The default is 0.05 (5%).
-h, --help
Display help text and exit.
EXAMPLES
$ empty-page -i test.tif
The image has 75461 dark pixels from a total of 1060992 (7.11231%).
non-empty
EXIT STATUS
The exit status is 0 if the image is mostly white, 1 otherwise.
SEE ALSO exactimage(7)AUTHORS
Jakub Wilk <jwilk@debian.org>
Wrote this manual page for the Debian system.
http://www.exactcode.de/site/open_source/exactimage/
This manual page incorporates texts found on the ExactImage homepage.
COPYRIGHT
This manual page was written for the Debian system (and may be used by others).
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 2 or (at
your option) any later version published by the Free Software Foundation.
On Debian systems, the complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL-2.
empty-page 09/09/2013 EMPTY-PAGE(1)