$ which perl
/Users/ken/perl5/perlbrew/perls/perl-5.24.0t/bin/perl
$ perlbrew off
perlbrew is turned off.
$ perlbrew list
  perl-5.14.0t
  perl-5.14.2
  perl-5.14.2t
  perl-5.18.0t
  perl-5.18.1t
  perl-5.20.0t
  perl-5.20.2t
  perl-5.22.0t
  perl-5.24.0t
  perl-5.25.9t
$ which perl
/usr/local/bin/perl