Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Replace values in script reading line by line using sed
Top Forums Shell Programming and Scripting Replace values in script reading line by line using sed Post 302918872 by RavinderSingh13 on Friday 26th of September 2014 01:06:15 AM
Old 09-26-2014
Quote:
Originally Posted by crimsonengineer
Hi all,

Let's say I have a script calling for the two variables PA_VALUE and PB_VALUE.
Code:
for PA_VALUE 
blah blah
do
for PB_VALUE
blah blah
do

I have a text file with two columns of values for PA and PB.
Code:
14.5 16.7
7.8 9.5
5.6 3.6
etc etc

I would like to read this text file line by line and replace the PA_VALUE and PB_VALUE with these values. The first row, first column would replace wherever PA_VALUE occurs in the script and replace the value in the first row, second column wherever PB_VALUE occurs. Then it would repeat line by line in the text document. I have thus been unable to achieve this. I am familiar with sed to replace values, but unsure how to link it to read a document line by line and replace in another script. Thanks.
Hello crimsonengineer,

Welcome to forum. Please let us know input and expected output for same.
It will be helpful for us.

Thanks,
R. Singh
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

sed - Replace Line which contains the Pattern match with a new line

I need to replace the line containing "STAGE_DB" with the line "STAGE_DB $DB # database that contains the table being loaded ($workingDB)" Here $DB is passed during the runtime. How can I do this? Thanks, Kousikan (2 Replies)
Discussion started by: kousikan
2 Replies

2. Shell Programming and Scripting

how can i replace / with new line in shell script or sed ?

1. how can i replace ' / ' with new line in shell script or sed ? 2. how can set a conditon untill null in while loop while ( i== null ) do ...... done (3 Replies)
Discussion started by: mail2sant
3 Replies

3. UNIX and Linux Applications

Reading values from the command line

Hi I want to give the user the choice of whether or not they want to include a certain option when they run the script. This is my getops: while getopts " s: d: r f: e h " option do case $option in f ) dsxfile="$OPTARG";; d ) dbname="$OPTARG";; s ) dsn="$OPTARG";; r )... (0 Replies)
Discussion started by: ladyAnne
0 Replies

4. Shell Programming and Scripting

how to use sed for reading from a file, line by line?

I have a file, from where I need to extract some data. But, the condition is like following : The script will read line by line,while checking if any line starts with 'MN'. If found true, it looks for if the immediate line starts with 'PQ' or not. If its true then, extract few fields from that... (1 Reply)
Discussion started by: mady135
1 Replies

5. Shell Programming and Scripting

sed to replace a line with modified line in same file

i have few lines in a file... i am reading them in a while loop so a particular line is held is $line1.. consider a modified line is held in $line2.... i want to replace $line1 with $line2 in the same file... how to do it..? i have come up till the below code sed "s/$line1/$line2/g" tmpfile.sql... (5 Replies)
Discussion started by: vivek d r
5 Replies

6. Shell Programming and Scripting

Sed Comparing Parenthesized Values In Previous Line To Current Line

I am trying to delete lines in archived Apache httpd logs Each line has the pattern: <ip-address> - - <date-time> <document-request-URL> <http-response> <size-of-req'd-doc> <referring-document-URL> This pattern is shown in the example of 6 lines from the log in the code box below. These 6... (1 Reply)
Discussion started by: Proteomist
1 Replies

7. Shell Programming and Scripting

I need to know how to replace a line after a pattern match with an empty line using SED

Hi How Are you? I am doing fine! I need to go now? I will see you tomorrow! Basically I need to replace the entire line containing "doing" with a blank line: I need to the following output: Hi How Are you? I need to go now? I will see you tomorrow! Thanks in advance.... (1 Reply)
Discussion started by: sags007_99
1 Replies

8. Shell Programming and Scripting

sed command to replace a line at a specific line number with some other line

my requirement is, consider a file output cat output blah sdjfhjkd jsdfhjksdh sdfs 23423 sdfsdf sdf"sdfsdf"sdfsdf"""""dsf hellow there this doesnt look good et cetc etc etcetera i want to replace a line of line number 4 ("this doesnt look good") with some other line ... (3 Replies)
Discussion started by: vivek d r
3 Replies

9. Shell Programming and Scripting

Multiple line search, replace second line, using awk or sed

All, I appreciate any help you can offer here as this is well beyond my grasp of awk/sed... I have an input file similar to: &LOG &LOG Part: "@DB/TC10000021855/--F" &LOG &LOG &LOG Part: "@DB/TC10000021852/--F" &LOG Cloning_Action: RETAIN &LOG Part: "@DB/TCCP000010713/--A" &LOG &LOG... (5 Replies)
Discussion started by: KarmaPoliceT2
5 Replies

10. Shell Programming and Scripting

sed command to replace a line in a file using line number from the output of a pipe.

Sed command to replace a line in a file using line number from the output of a pipe. Is it possible to replace a whole line piped from someother command into a file at paritcular line... here is some basic execution flow.. the line number is 412 lineNo=412 Now i have a line... (1 Reply)
Discussion started by: vivek d r
1 Replies

LEARN ABOUT REDHAT

replace

REPLACE(1)						      General Commands Manual							REPLACE(1)

NAME

       replace	-  A utility program that is used by msql2mysql, but that has more general applicability as well. replace changes strings in place
       in files or on the standard input. Uses a finite state machine to match longer strings first. Can be used to swap strings.

USAGE

       replace [-?svIV] from to from to ... -- [files]

       or

       replace [-?svIV] from to from to ... < fromfile > tofile

SYNOPSIS

       replace [-?|-I] [-s] [-v]

DESCRIPTION

       replace

       -?|-I  info

       -s     silent

       -v     verbose

EXTRA INFO

       Special characters in from string:

       ^     Match start of line.

       $     Match end of line.

            Match space-character, start of line or end of line. For a end  the next replace starts locking at the end space-character.  A	
	      alone in a string matches only a space-character.

EXAMPLE

       this command swaps a and b in the given files:

       shell> replace a b b a -- file1 file2 ...

SEE ALSO

       isamchk	(1),  isamlog (1), mysqlaccess (1), mysqladmin (1), mysqlbug (1), mysqld (1), mysqldump (1), mysqlshow (1), msql2mysql (1), perror
       (1), replace (1), safe_mysqld (1), which1 (1), zap (1),

AUTHOR

       Ver 1.0, distribution 3.23.29a Michael (Monty) Widenius (monty@tcx.se), TCX Datakonsult AB (http://www.tcx.se).	This software  comes  with
       no  warranty.  Manual page by L. (Kill-9) Pedersen (kill-9@kill-9.dk), Mercurmedia Data Model Architect / system developer (http://www.mer-
       curmedia.com)

								 20 December 2000							REPLACE(1)
All times are GMT -4. The time now is 04:55 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy