sisyphus-sis@debian-sis:~/bleadperl/bin$ mv perl perl5.21.3 sisyphus-sis@debian-sis:~/bleadperl/bin$ cd ~ sisyphus-sis@debian-sis:~$ which perl /usr/bin/perl sisyphus-sis@debian-sis:~$ perl5.21.3 -le 'print $^X' /home/sisyphus-sis/bleadperl/bin/perl5.21.3