Sponsored Content
Top Forums UNIX for Dummies Questions & Answers saving command output to a variable Post 302278449 by philjo on Tuesday 20th of January 2009 09:02:00 AM
Old 01-20-2009
saving command output to a variable

Hello,

I have a shell script containing a command string in the following format:

command1 | command2 | cut -c9-16

The output from this is a record number (using characters 9-16 of the original output string) e.g. ORD-1234
I wish to save this value to a variable for use in later commands within the same script.

If I run the commands without defining the variable it runs OK and returns the correct number to the screen.
I tried doing var1=`command1 | command2 | cut -c9-16`
but I kept getting some syntax errors (probably due to the fact that command 1 does an echo of a long string of characters containing lots of ^ as field delimiters)

Please can anyone suggest the best way to do this?

Many thanks
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Command output to a variable.

With cut -c 8-13 myfile, I am getting some numeric value. In my shell script I am trying to assign something like this, var=cut -c 8-13 myfile But at the time of execution I am getting -c is not found. If I dont assign, then script executes well. Can we not simply use the value from one... (8 Replies)
Discussion started by: videsh77
8 Replies

2. Shell Programming and Scripting

Assigning output of command to a variable

Hi, I'm trying to assign the output of a command to a variable and then concat it with another string, however, it keeps overwriting the original string instead of adding on to the end of the string. Contents of test.txt --> This is a test var1="`head -n 1 test.txt`" echo $var1 (This is a... (5 Replies)
Discussion started by: oma04
5 Replies

3. Shell Programming and Scripting

Saving output from awk into a perl variable

How would I pass awk output to a perl variable? For example, I want to save the value in the 4th column into the variable called test. My best guess is something as follow, but I am sure this isn't correct. $test = system("awk '/NUMBER/{print \$4}' $_"); (8 Replies)
Discussion started by: userix
8 Replies

4. Programming

Command output into a variable

Hi, with this command: cu -l /dev/ttyACM0 -s 9600 > name.txt I put the output of the port in a txt Is posible to do the same (or similar) in a var directly, inside a C program? cu -l /dev/ttyACM0 -s 9600 > variable ? I have trying this withs pipes, but i dont know how to... (6 Replies)
Discussion started by: daaran
6 Replies

5. Shell Programming and Scripting

Trouble saving variable

Hi, I have problems when you save a variable of a command. I have put the following line: CONEXION_BAGDAD = $ (grep-c "Please login with USER and PASS" $ LOG_FILE_BAGDAD) But I returned the following error: syntax error at line 67: `CONEXION_BAGDAD = $ 'unexpected Because it can happen?... (2 Replies)
Discussion started by: danietepa
2 Replies

6. UNIX for Dummies Questions & Answers

Saving a temporary output within a script

Good morning everyone, i am looking to know how to save the output of a command and reuse it again within a script i already tired this one but it didn't work TEMPDIR=/dir1/dir2 My_command> $TEMPDIR/$TEMPFILE rm $TEMPDIR/$TEMPFILE* it keeps saying "cannot write to a... (15 Replies)
Discussion started by: Portabello
15 Replies

7. Shell Programming and Scripting

saving output from bash into a file

I am ssh to many servers to get some information... however sometimes the server is unreacheable and i am getting an error. I want to save that output to a file but I am not able to do so... I want to be able to save output of bash into a file.. so when I run this command on a script ssh... (5 Replies)
Discussion started by: eponcedeleonc
5 Replies

8. Shell Programming and Scripting

Saving files with file name as output

Hi, i need help with a file creation of an output program. I've got a program that with #find creates an output for each files in a directory. If i give this command : -o spec$(date -u +%Y%m%dt%H%M) it creates just one file, overwriting all the others since it is the creation date .... (2 Replies)
Discussion started by: Board27
2 Replies

9. Shell Programming and Scripting

sed command is saving output as blank file

Hi, I am working on a script where I am adding adding colors to few of the info in the output. Now , after that is done , I see colour codes in log files which I don't want to see.:mad::mad::mad::mad: So , I tried using sed command in script as below which gives me o/p (new.log) as blank file... (7 Replies)
Discussion started by: Dream4649
7 Replies

10. Shell Programming and Scripting

Saving Mod in a variable

Hello Experts, In one of my shell script, I've been trying to calculate mod and saving it in a variable, below is what I have tried but it isn't working. Any help appreciated!!! #!/bin/bash num1=4 num2=3 echo "Number one is $num1" echo "Number two is $num2" mod_final=$(( echo "num1%num2"... (7 Replies)
Discussion started by: mukulverma2408
7 Replies
nohup(1)						      General Commands Manual							  nohup(1)

NAME
nohup - run a command immune to hangups SYNOPSIS
command [arguments] DESCRIPTION
executes command with hangups and quits ignored. If output is not redirected by the user, both standard output and standard error are sent to If is not writable in the current directory, output is redirected to otherwise, fails. If a file is created, the file's permission bits will be set to If output from is redirected to a terminal, or is not redirected at all, the output is sent to EXTERNAL INFLUENCES
Environment Variables determines the language in which messages are displayed. If is not specified in the environment or is set to the empty string, the value of is used as a default for each unspecified or empty vari- able. If is not specified or is set to the empty string, a default of "C" (see lang(5)) is used instead of If any internationalization variable contains an invalid setting, behaves as if all internationalization variables are set to "C". See environ(5). International Code Set Support Single- and multi-byte character code sets are supported. EXAMPLES
It is frequently desirable to apply to pipelines or lists of commands. This can be done only by placing pipelines and command lists in a single file, called a shell script. To run the script using features apply to the entire contents of file. If the shell script file is to be executed often, the need to type can be eliminated by setting execute permission on file. The script can also be run in the background with interrupts ignored (see sh(1)): file typically contains normal keyboard command sequences that one would want to continue running in case the terminal disconnects, such as: WARNINGS
Be careful to place punctuation properly. For example, in the command form: applies only to command1. To correct the problem, use the command form: Be careful of where standard error is redirected. The following command may put error messages on tape, making it unreadable: whereas puts the error messages into file EXIT STATUS
The following exit values are returned: The command specified by command was found but could not be invoked An error occurred in the nohup utility or the specified command could not be found Otherwise, the exit status of nohup will be that of the command specified. SEE ALSO
chmod(1), nice(1), sh(1), signal(5). STANDARDS CONFORMANCE
nohup(1)
All times are GMT -4. The time now is 08:20 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy