Replacing in huge text file

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Filter records in a huge text file from a filter text file

Hi Folks, I have a text file with lots of rows with duplicates in the first column, i want to filter out records based on filter columns in a different filter text file. bash scripting is what i need. Data.txt Name OrderID Quantity Sam 123 300 Jay 342 498 Kev 78 2500 Sam 420 50 Vic 10...

2. Shell Programming and Scripting

Output only first 400 bytes of a huge text file

How do I output only the first 400 bytes of a huge text file to a new file. It has to be unmodified so no added invisible characters. Many thanks.....

3. Shell Programming and Scripting

How to open a huge text file?

Hi. I have a 10 Gb text file.the default text editor in ubuntu doens't open it. Does anyone know how can i open it?? Thanks

4. UNIX for Dummies Questions & Answers

Replacing a column in a text file

Say I had a text file that contained four columns, like the following: Mack Christopher:237 Avondale Blvd:970-791-6419:S Ben Macdonor:30 Dragon Rd:647-288-6395:B I'm making a loop that will replace the fourth column a line in the file with the contents of a variable 'access', but I have no...

5. Shell Programming and Scripting

Replacing second line from huge files

I'm trying simple functionality of replacing the second line of files with some other string. Problem is these files are huge and there are too many files to process. Could anyone please suggest me a way to replace the second line of all files with another text in a fastest possible manner. ...

6. UNIX for Dummies Questions & Answers

Help parsing and replacing text with file name

Hi everyone, I'm having trouble figuring this one out. I have ~100 *.fa files with multiple lines of fasta sequences like this: file1.fa >xyzsequence atcatgcacac...... ataccgagagg..... atataccagag..... >abcsequence atgagatatat..... acacacggd..... atcgaacac.... agttccagat.... The...

7. Shell Programming and Scripting

replacing text with contents from another file

I'm trying to change the ramfs size in kernel .config automatically. I have a ramfs_size file generated with du -s cat ramfs_size 64512 I want to replace the linux .config's ramdisk size with the above value CONFIG_BLK_DEV_RAM_SIZE=73728 Right now I'm doing something dumb like: ...

8. Shell Programming and Scripting

replacing text in a file, but...

Hi all, Very first post on this forums, hope you can help me with this scripting task. I have a big text file with over 3000 lines, some of those lines contain some text that I need to replace, lets say for simplicity the text to be replaced in those lines is "aaa" and I need it to replace it...

9. Shell Programming and Scripting

Replacing Text in Text file

Hi Guys, I am needing some help writing a shell script to replace the following in a text file /opt/was/apps/was61 with some other path eg /usr/blan/blah/blah. I know that i can do it using sed or perl but just having difficulty writing the escape characters for it All Help...

10. UNIX for Dummies Questions & Answers

How to remove FIRST Line of huge text file on Solaris

i need help..!!!! i have one big text file estimate data file size 50 - 100GB with 70 Mega Rows. on OS SUN Solaris version 8 How i can remove first line of the text file. Please suggest me for solutions. Thank you very much in advance:)

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)

Shell Programming and Scripting