root@kungfoo:~# ls -la /usr/local/bin/perl; ls -la /usr/bin/perl
-rwxr-xr-x  2 root root 1021898 2006-05-13 23:27 /usr/local/bin/perl
-rwxr-xr-x  2 root root 1061656 2005-12-12 15:10 /usr/bin/perl