Talk:Guide to Unix/Environment Variables

EMAIL
EMAIL can be used to write an email address for the user, like 'user@example.org', but I can't find any reference to it. Many VCS like git and hg use it for default committer.

But can it also set to: 'User Name ', or would that be an error?

95.166.24.42 (talk) 12:43, 10 November 2010 (UTC)

DIFF environment variable
This should be added.

Please add guidelines or best practices to set environmental variables.
What are the different ways to set environment variables? What are the consequences of the different methods? Which way is most widely used?