System 1:
$ perl -v
This is perl, v5.8.8 built for i386-linux-thread-multi

libc=/lib/libc-2.5.so

$ uname -a
Linux hostname.removed 2.6.18-8.1.1.el5 #1 SMP Mon Feb 26 20:38:02 EST 2007 i686 i686 i386 GNU/Linux


System 2:
test$ perl -v
This is perl, v5.8.6 built for i686-linux-64int

libc=/lib/libc-2.3.2.so

test$ uname -a
Linux hostname.removed 2.6.9-55.0.6.ELsmp #1 SMP Tue Sep 4 21:36:00 EDT 2007 i686 unknown