Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Updating variables using sed or awk
Top Forums Shell Programming and Scripting Updating variables using sed or awk Post 302953153 by Saanvi1 on Tuesday 25th of August 2015 02:24:39 PM
Old 08-25-2015
Updating variables using sed or awk
Hi,
I have a file(testfile.txt) that contains list of variables as shown below. T

Code:
$$FirstName=James
$$LastName=Fox
$$Dateofbirth=1980-02-04

……and so on there are 50 different variables.

I am writing a script(script1.sh) that will update the above three variable one by one with the values passed as a parameter to the script.

So Script1.sh Ron Donnely 1960-01-31 passing the three parameters.

Scripts1.sh take these three parameter in $1, $2 and $3.

I am trying to see if there is a SED or AWK that I can use in Script1.sh to update the testfile.txt to update the variable values with the values passed to the script as a parameter. So the values in testfile.txt should look like something below:

Code:
$$FirstName=Ron
$$LastName=Fox
$$Dateofbirth=1960-01-31

Please note: Variable Filename cannot be changed.

Will appreciate any help.
Thanks
Last edited by Corona688; 08-25-2015 at 03:30 PM..
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Manipulating awk $variables using sed?

I have been searching around the forums here trying to find a solution to my problem but not getting anywhere but closer to baldness. I have a 20 column pipe "|" seperated text file. The 14th variable doesnt always exist, but will have the format of YYYYMM or YYYY if it does. I need to take... (2 Replies)
Discussion started by: r0sc0
2 Replies

2. Shell Programming and Scripting

using sed on bash variables (or maybe awk?)

Hi all- I've been fooling with this for a few days, but I'm rather new at this... I have a bash variable containing a long string of various characters, for instance: JUNK=this that the other xyz 1234 56 789 I don't know what "xyz" actually is, but I know that: START=he other and ... (2 Replies)
Discussion started by: rev66
2 Replies

3. Shell Programming and Scripting

Accessing Shell Variables in awk or sed

Hello, I wonder if it is possible to pass and use variables from shell environment into sed or awk. I am trying to achieve something similar to the following using sed or awk: var=some_regular_expression grep "$var" filename # Will extract lines from filename The following code,... (3 Replies)
Discussion started by: nasersh
3 Replies

4. Shell Programming and Scripting

awk updating one file with another, comparing, updating

Hello, I read and search through this wonderful forum and tried different approaches but it seems I lack some knowledge and neurones ^^ Here is what I'm trying to achieve : file1: test filea 3495; test fileb 4578; test filec 7689; test filey 9978; test filez 12300; file2: test filea... (11 Replies)
Discussion started by: mecano
11 Replies

5. Shell Programming and Scripting

Using variables within awk/sed commands

Can I use my own variables within awk and sed for example: I've written a while loop with a counter $i and I want to use the value of $i within sed and awk to edit certain lines of text within a data file. I want to use : sed '1s/$/texthere/g' data.csv Like this: sed '$is/$/$age/g' data.csv... (5 Replies)
Discussion started by: mustaine85
5 Replies

6. Shell Programming and Scripting

Updating a line in a large csv file, with sed/awk?

I have an extremely large csv file that I need to search the second field, and upon matches update the last field... I can pull the line with awk.. but apparently you cant use awk to directly update the file? So im curious if I can use sed to do this... The good news is the field I want to... (5 Replies)
Discussion started by: trey85stang
5 Replies

7. UNIX for Dummies Questions & Answers

Updating environment variables

ok, this definitely falls in the n00b category... I'm trying to upgrade Java on my server and just need to update the PATH, CLASSPATH, and JAVA_HOME environment variables. This is what they currently are:... (4 Replies)
Discussion started by: jtennent
4 Replies

8. Shell Programming and Scripting

print pattern between two variables awk sed

I am trying to print text between two variables in a file I have tried the following things but none seem to work: awk ' /'$a'/ {flag=1;next} /'$b'/{flag=0} flag { print }' file and also sed "/$a/,/$b/p" file But none seem to work Any Ideas? Thanks in Advance (5 Replies)
Discussion started by: forumbaba
5 Replies

9. Shell Programming and Scripting

Variables into SED or AWK and multiple commands

Hello I am hoping you may help. I am not sure how to go about this exactly, I know the tools but not sure how to make them work together. I have two SED commands that I would like to run in a shell script. I would like to take the manual input of a user (types in when prompted) to be used... (4 Replies)
Discussion started by: lostincashe
4 Replies

10. UNIX for Dummies Questions & Answers

Use of Variables in a sed/awk script

Hi, After looking at the differents post on this forum, I am convinced that I will benefit from the experience of advanced Unix user on some script I have already done for an aeronautical study. Here is one of them : Step 1 : sed -e "s/??/00/g" Base_Awk.txt > Awk_Cut_00.txt4; sed... (11 Replies)
Discussion started by: Marc_Camoc
11 Replies

LEARN ABOUT DEBIAN

service

service(8)						      System Manager's Manual							service(8)

NAME

       service - run a System V init script

SYNOPSIS

       service SCRIPT COMMAND [OPTIONS]

       service --status-all

       service --help | -h | --version

DESCRIPTION

       service	runs a System V init script in as predictable an environment as possible, removing most environment variables and with the current
       working directory set to /.

       The SCRIPT parameter specifies a System V init script, located in /etc/init.d/SCRIPT.  The  supported  values  of  COMMAND  depend  on  the
       invoked	script.  service passes COMMAND and OPTIONS to the init script unmodified.  All scripts should support at least the start and stop
       commands.  As a special case, if COMMAND is --full-restart, the script is run twice, first with the stop command, then with the start  com-
       mand.

       service --status-all runs all init scripts, in alphabetical order, with the status command.

EXIT CODES

       service calls the init script and returns the status returned by it.

FILES

       /etc/init.d
	      The directory containing System V init scripts.

ENVIRONMENT

       LANG, TERM
	      The only environment variables passed to the init scripts.

SEE ALSO

       /etc/init.d/skeleton,
       update-rc.d(8),
       init(8),
       invoke-rc.d(8).

								     Jan 2006								service(8)
All times are GMT -4. The time now is 07:35 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy