Perl uses several environment variables. With a few exceptions, these all start with
PERL. Library packages and platform-dependent features may have their own environment variables.
These are the most common environment variables:
Used if chdir has no argument.
LC_ALL, LC_CTYPE, LC_COLLATE, LC_NUMERIC, PERL_BADLANG, LANGUAGE, LANG
Controls how Perl handles data specific to particular natural languages.
Used if chdir has no argument and
HOME is not set.
Used in executing subprocesses, and in finding the Perl script if
-S is used.
A colon-separated list of directories to search for Perl library files before looking in the standard library and the current directory.
Used instead of
PERL5LIB is not defined.
Initial (command-line) options for Perl.