how to assign an output to a variable


 
Thread Tools Search this Thread
Top Forums UNIX for Dummies Questions & Answers how to assign an output to a variable
# 1  
Old 07-05-2005
how to assign an output to a variable

Hi,

I am giving a grep command, and i am getting the output. i want to store it in a variable

for eg

a = grep '12345' /dir/1/2/log.txt ( the output is number)
b= grep 'basic' /dir/1/2/log1.txt (in this case the output is character)

so how to assign the output of grep to a variable

pls help
# 2  
Old 07-05-2005
Here it is.

Code:
a=`grep -o '12345' /dir/1/2/log.txt`

If there are more occurences then the last occurrence will be saved into the variable.

If you need just the first occurrence, use

Code:
a=`grep -m 1 -o '12345' /dir/1/2/log.txt`

Check out the man pages of grep for other options.

Vino
 
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

How to Assign the Output of an SQL Query to a Variable?

Hi iam new to shell scripting how to declare variables as redshift query and I have to compare two counts by using if condition . ex:count=select count(*) from prd; select count(*) from prd; select count(*) from tag; can any one help me . Please use CODE tags when displaying... (1 Reply)
Discussion started by: sam526
1 Replies

2. Shell Programming and Scripting

ksh PS4 variable assign to `date` output

Hi guys, Is there a way to assign curent time to PS4 variable in ksh. My goal is to have each line produced by 'set -x' command to have a time stamp. Here is my code: $cat test #!/usr/bin/ksh export PS4="`date` " set -x echo "TRACE LINE ONE" echo "I WILL SLEEP FOR 10 SEC" sleep 10... (2 Replies)
Discussion started by: aoussenko
2 Replies

3. Shell Programming and Scripting

Assign output to dynamic variable

Hi Folks, I am trying to assign a value from the command to a dynamic variable. But I am not getting the desired output.. I am sure something is wrong so i need experts advise. There will be multiple files like /var/tmp/server_1, /var/tmp/server_2, /var/tmp/server_3, having different server... (6 Replies)
Discussion started by: ganga.dharan
6 Replies

4. Shell Programming and Scripting

Unable to assign command output to variable

Code set -x STATUS="0" echo $STATUS for i in `ls -ltr Report*|awk '{ print $9 }'` do if then flg = "`head -1 "$i" |cut -c 31-33`" echo `head -1 "$i" |cut -c 31-33` echo $flg if then echo "having Fun" STATUS="2" else echo "no Fun" fi fi (2 Replies)
Discussion started by: Funkeydude
2 Replies

5. Shell Programming and Scripting

Assign perl output to ksh shell variable

Hello, I am writing a ksh script on an AIX system. I need to get the date and time from a file into a variable. I found the following perl script from another post on this site and modified it slightly to output the format I need: perl -e '@d=localtime ((stat(shift)));... (4 Replies)
Discussion started by: swimp
4 Replies

6. Shell Programming and Scripting

Assign dscl output to variable as an array

Greetings folks, I am trying to assign the output of a dscl command (contains name<spaces>id) to a variable as an array. Currently I am piping the output into a tmp file, then reading the tmp file into an array, then parsing the array. I would like to bypass creating the tmp file portion of... (6 Replies)
Discussion started by: macnetdaemon
6 Replies

7. Shell Programming and Scripting

assign awk output to bash variable

greetings all, I am have a heck of a time trying to accomplish a very simple thing. I have an array of "shortname<spaces>id" created from a dscl output. I want to assign shortname=word1 and id=word2. I have tried shortname=$(${textArray} | awk '{print $1}') - and get 'awk : cannot open... (3 Replies)
Discussion started by: macnetdaemon
3 Replies

8. Shell Programming and Scripting

Assign command (with pipe) output to a variable

Hi , I would like to assign command (with pipe) output to a variable. The code is as follows. The goal of the code is to get the last folder folder with a particular name pattern. myDate=`ls | grep 2009 | tail -1` echo "myDate=" $myDate However, in the presence of the pipe, the code... (3 Replies)
Discussion started by: jeff_cen
3 Replies

9. Shell Programming and Scripting

how to assign the output of the interective script to the variable

Hi, I work in ksh88. I have an interective script which prompts the user for the input and returns numeric value depending on the input provided. I need to call this script inside another script and then assign the resulting output the the variable. The call like that A=`my script` obviously... (6 Replies)
Discussion started by: aoussenko
6 Replies

10. Shell Programming and Scripting

hot to assign output to a variable

I want to assign a comment to a veriable for example my program head -1 myfile I want to assıgn output to a variable (1 Reply)
Discussion started by: walnut
1 Replies
Login or Register to Ask a Question