There are a couple of ways you can do this:

    The first is to make the other script executable, add the #!/bin/bash line at the top, and the path where the file is to to the $PATH environment variable. Then you can can call it as a normal command.

    Call it with the source command (alias is .) like this: source /path/to/script.

    Use the bash command to execute it: /bin/bash /path/to/script.

The first and third methods executes the script as another process, so variables and functions in the other script will not be accessible. The second method executes the script in the first scripts process, and pulls in variables and functions from the other script so they are usable from the calling script.