How to reference a file for variables using Bash?

The short answer

Use the source command.

An example using source

For example:

config.sh

#!/usr/bin/env bashproduction="liveschool_joe"playschool="playschool_joe"echo $playschool

script.sh

#!/usr/bin/env bashsource config.shecho $production

Note that the output from sh ./script.sh in this example is:

~$ sh ./script.sh playschool_joeliveschool_joe

This is because the source command actually runs the program. Everything in config.sh is executed.

Another way

You could use the built-in export command and getting and setting "environment variables" can also accomplish this.

Running export and echo $ENV should be all you need to know about accessing variables. Accessing environment variables is done the same way as a local variable.

To set them, say:

export variable=value

at the command line. All scripts will be able to access this value.

even shorter using the dot:

#!/bin/bash. CONFIG_FILEsudo -u wwwrun svn up /srv/www/htdocs/$productionsudo -u wwwrun svn up /srv/www/htdocs/$playschool

Use the source command to import other scripts:

#!/bin/bashsource /REFERENCE/TO/CONFIG.FILEsudo -u wwwrun svn up /srv/www/htdocs/$productionsudo -u wwwrun svn up /srv/www/htdocs/$playschool