The file script.sh in the current directory contains the following content:
#!/bin/bash
echo $MYVAR
The following commands are used to execute this script:
MYVAR=value -
./script.sh
The result is an empty line instead of the content of the variable MYVAR. How should MYVAR be set in order to make script.sh display the content of MYVAR?
To ensure that the variable MYVAR is available to the script, it must be exported. The command 'export MYVAR=value' sets the MYVAR variable and exports it to the environment, making it available to any subsequently executed programs, including shell scripts. Simply setting the variable with 'MYVAR=value' without exporting it will not make it available to child processes.
A good source to look into more on this. https://www.serverlab.ca/tutorials/linux/administration-linux/how-to-set-environment-variables-in-linux/
Reviewed. Thank you!
We need to export the variable for it to be inherited by another program - including a shell script.