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Asked: 2026-06-18T09:14:02+00:00

I want to create a variable with its name partly dynamic and export it

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I want to create a variable with its name partly dynamic and export it from my bash shell script. I have been trying to do it the following way. No success though. Please tell me where I am wrong.

#!/bin/bash
CURRENT_PROCESS_ID=$$
var=METASTORE_JDBC_DRIVER_$CURRENT_PROCESS_ID
echo $var
export $var='1'

execution command

bash <filename>.sh

I am hoping the script would create an environmental variable like METASTORE_JDBC_DRIVER_8769 and I should be able to use that out of the script but when I do
echo $METASTORE_JDBC_DRIVER_8769 outside the script, doesn’t give me anything. Any suggestions/ideas are welcomed.

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1 Answer

  1. Editorial Team

    Export exports variables into the current shell context. By running your script with bash it gets set in that shell’s context. You need to source the file to have it run in the current shell context.

    source <filename>.sh

    Just to show the difference between a sub-shell and source:

    [nedwidek@yule ~]# bash test.sh
METASTORE_JDBC_DRIVER_8422
[nedwidek@yule ~]# env |grep META
[nedwidek@yule ~]# source test.sh
METASTORE_JDBC_DRIVER_8143
[nedwidek@yule ~]# env |grep META
METASTORE_JDBC_DRIVER_8143=1
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