Defining common variables across multiple scripts?

Question

I have a number of Bash and Perl scripts which are unrelated in functionality, but are related in that they work within the same project. The fact that they work in the same

Answer 1

Define environments variables : user level : in your ~/.profile or ~/.bash_profile or ~/.bash_login or ~/.bashrc system level : in /etc/profile or /etc/bash.bashrc or /etc/environment

For example add tow lines foreach variable :

FOO=myvalue
export FOO 

To read this variable in bash script :

#! /bin/bash

echo $FOO

in perl script :

#! /bin/perl

print $ENV{'FOO'};