$ which perl
/usr/bin/perl
$ perl -v
This is perl, v5.8.8 built for x86_64-linux-thread-multi
$ perl -V | tail -8
  Compiled at Nov  6 2008 13:11:21
  @INC:
    /lib/5.8.8/x86_64-linux-thread-multi
    /lib/5.8.8
    /lib/site_perl/5.8.8/x86_64-linux-thread-multi
    /lib/site_perl/5.8.8
    /lib/site_perl
    .
$ 

##</code><code>##

  @INC:
    /usr/lib64/perl5/site_perl/5.8.8/x86_64-linux-thread-multi
    /usr/lib64/perl5/site_perl/5.8.7/x86_64-linux-thread-multi
    /usr/lib64/perl5/site_perl/5.8.6/x86_64-linux-thread-multi
    /usr/lib64/perl5/site_perl/5.8.5/x86_64-linux-thread-multi
    /usr/lib/perl5/site_perl/5.8.8
    /usr/lib/perl5/site_perl/5.8.7
    /usr/lib/perl5/site_perl/5.8.6
    /usr/lib/perl5/site_perl/5.8.5
    /usr/lib/perl5/site_perl
    /usr/lib64/perl5/vendor_perl/5.8.8/x86_64-linux-thread-multi
    /usr/lib64/perl5/vendor_perl/5.8.7/x86_64-linux-thread-multi
    /usr/lib64/perl5/vendor_perl/5.8.6/x86_64-linux-thread-multi
    /usr/lib64/perl5/vendor_perl/5.8.5/x86_64-linux-thread-multi
    /usr/lib/perl5/vendor_perl/5.8.8
    /usr/lib/perl5/vendor_perl/5.8.7
    /usr/lib/perl5/vendor_perl/5.8.6
    /usr/lib/perl5/vendor_perl/5.8.5
    /usr/lib/perl5/vendor_perl
    /usr/lib64/perl5/5.8.8/x86_64-linux-thread-multi
    /usr/lib/perl5/5.8.8
    .

$ uname -a
Linux desktop 2.6.18-92.el5 #1 SMP Tue Jun 10 18:51:06 EDT 2008 x86_64 x86_64 x86_64 GNU/Linux