in reply to Re^2: perl version
in thread perl version
Environment variables are sort of a shell thing (because the shell usually provides the OS environment which surrounds your computations/program invocations). You may add some default settings of specific environment variables to the profile files that your shell reads at session startup (eg. ".profile" or ".bash_profile") and you'll get the behavior you want. That's what Andreas was telling about when he provided pointers where you could read about shell features.
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