Grep for NULL for a specific field in a unix file Post: 302097326

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Grep for NULL in a pipe delimited file

hi, How can I check for a field in a pipe-delimited file having a NULL value in Unix using a grep command or any other command. Please reply

2. HP-UX

extract field of characters after a specific pattern - using UNIX shell script

Hello, Below is my input file's content ( in HP-UX platform ): ABCD120672-B21 1 ABCD142257-002 1 ABCD142257-003 1 ABCD142257-006 1 From the above, I just want to get the field of 13 characters that comes after 'ABCD' i.e '120672-B21'... . Could...

3. UNIX for Dummies Questions & Answers

how to grep from specific field

the file has several date fields.for example, #2, #3,and #5 are date fields. I want grep year '2002' just within #2 field and get all the rows which content year '2002' in the #2 field. is it possible to do this? how to do it? Thanks

4. Shell Programming and Scripting

awk Problem while insert null field to file

Dear All, I have the following input file. I want to replace data with null values. I/P File: 9022334455|2008-12-06 06:10:21|2|Error@@@|esoo8erp| 9024334432|2008-12-06 08:40:59|6|Error@@@|6y2o8e6r| O/P File: 9022334455||2||esoo8erp| 9024334432||6||6y2o8e6r| ...

5. Shell Programming and Scripting

replacing field in specific line in a file

Hi, I know there are lots of threads on replacing text within files, usually using sed or awk. However, I find it hard to adapt examples that I found to my specific case. I am kind of new to UNIX and have hard times learning the syntax either for sed or awk so I would appreciate any help. Here's...

6. Shell Programming and Scripting

Help with grep at specific field of a file

hi, I would like to search for a specific string at a specific line in a file and would like to know the count of it. eg: samp.txt ABC 1234 BELL HNZ 4567 RING NNN 5673 BELL Please help with the command to find the count of BELL in the above file samp.txt at the specific line 10 with...

7. Shell Programming and Scripting

Replace a field where values are null in a file.

Hi, I've a pipe delimited file and wanted to replace the 3rd field to 099990 where the values are null. How can I achieve it using awk or sed. 20130516|00000061|02210|111554|03710|2|205069|SM APPL $80-100 RTL|S 20130516|00000061|02210|111554|03710|2|205069|SM APPL $80-100 RTL|S...

8. UNIX for Dummies Questions & Answers

Quick UNIX command to display specific lines in the middle of a file from/to specific word

This could be a really dummy question. I have a log text file. What unix command to extract line from specific string to another specific string. Is it something similar to?: more +/"string" file_name Thanks

9. Shell Programming and Scripting

Grep null values in a file with no delimiter

Hi Folks, We have a file that has null values but there are no delimiters. So all columns are considered as a single column. Ex: abc def 123 abcdef1234567 hijklmn7896545 Now from "a" till "3" all are considered as a single column from the first row. Our requirement is like, we...

10. Shell Programming and Scripting

Add tab after digit in specific field in file

I am trying to add a tab after the last digit in $3 in the input. The grep below is all I can think off. Thank you :) sed -n 's/:/&/p' input input chr1 955542 955763AGRN-6|gc=75 chr1 957570 957852AGRN-7|gc=61.2 chr1 976034 976270AGRN-9|gc=74.5 desired output chr1...

LEARN ABOUT FREEBSD

color.4th

COLOR.4TH(8)						    BSD System Manager's Manual 					      COLOR.4TH(8)

NAME

     color.4th -- FreeBSD color-detection boot module

DESCRIPTION

     The file that goes by the name of color.4th is a set of commands designed to simplify color logic.  The commands of color.4th by themselves
     are not enough for most uses.  Please refer to the examples below for the most common situations, and to loader(8) for additional commands.

     Before using any of the commands provided in color.4th, it must be included through the command:

	   include color.4th

     This line is present in /boot/loader.4th file, so it is not needed (and should not be re-issued) in a normal setup.

     The commands provided by it are:

	   loader_color?	  Returns FALSE if the loader_color environment variable is set to ``NO'' (case-insensitive) or ``0''.	Otherwise
				  returns TRUE (unless booting serial).

     The environment variables that effect its behavior are:

	   loader_color
		     If set to ``NO'' (case-insensitive) or ``0'', causes loader_color? to return FALSE, indicating to many modules that color
		     should not be used.

FILES

     /boot/loader      The loader(8).
     /boot/color.4th   color.4th itself.
     /boot/loader.rc   loader(8) bootstrapping script.

EXAMPLES

     Standard i386 /boot/loader.rc:

     Use color where applicable:

	   loader_color="YES"

SEE ALSO

     loader.conf(5), loader(8), loader.4th(8)

HISTORY

     The color.4th set of commands first appeared in FreeBSD 9.0.

AUTHORS

     The color.4th set of commands was written by Devin Teske <dteske@FreeBSD.org>.

BSD
								  August 6, 2013							       BSD

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Grep for NULL in a pipe delimited file

Discussion started by: sureshg_sampat

2. HP-UX

extract field of characters after a specific pattern - using UNIX shell script

Discussion started by: jansat

3. UNIX for Dummies Questions & Answers

how to grep from specific field

Discussion started by: tiff-matt

4. Shell Programming and Scripting

awk Problem while insert null field to file

Discussion started by: hanu_oracle