http://www.perlmonks.org?node_id=711900


in reply to Maintaining several perl versions on the same box

OTTOMH, two ways:
One: call the actual perl binary, i.e. %/usr/local/perl myprogram.pl
Two: temporarily reorder the $PATH variable in your shell, i.e. 

%echo $PATH
/usr/bin/:/usr/local/bin

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(perl is system 5.8.8 perl)
%PATH=/usr/local/bin/:/usr/bin
%echo $PATH
/usr/local/bin/:/usr/bin

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(perl is local 5.10 perl, as the shell looks for "perl" according to the order of folders in $PATH).
Actual syntax may varies with your flavour of *NIX/shell.

Stop saying 'script'. Stop saying 'line-noise'.
We have nothing to lose but our metaphors.

In Section Seekers of Perl Wisdom