Here’s how to read Bash variables from another file.
Contents of config.sh
#!/bin/bash var1='thisisvariableone' var2='thisisvariabletwo'
Call config.sh from another script.
#!/bin/bash source config.sh echo var1 echo var2
This is extremely helpful if you have multiple scripts using a common variable. You just to update one file instead of multiple files. All the other scripts will read and pick up the same variables from a config file. You can use this to setup your global variables.