$ ls -l /usr/lib/perl5/site_perl/5.8.8/WWW
total 104
drwxr-xr-x 2 root root  4096 Jul 23 12:56 Mechanize
-rwxr-xr-x 1 root root 79472 Feb  2 16:38 Mechanize.pm
drwxr-xr-x 2 root root  4096 Jul 23 12:47 RobotRules
-rwxr-xr-x 1 root root 11155 Feb 18 06:05 RobotRules.pm
$ ls -l /usr/lib/perl5/site_perl/5.8.8/LWP/Protocol/http.pm
-r--r--r-- 1 root root 13822 Feb 11 08:02 /usr/lib/perl5/site_perl/5.8.8/LWP/Protocol/http.pm
$ sudo perl -MCPAN -e shell

cpan shell -- CPAN exploration and modules installation (v1.9800)
Enter 'h' for help.
                                                            cpan[1]>  install WWW::Mechanize
WWW::Mechanize is up to date (1.72).

cpan[2]> install LWP::UserAgent
LWP::UserAgent is up to date (6.04).

cpan[3]> install LWP::Protocol
LWP::Protocol is up to date (6.00).

cpan[4]> install HTTP::Request
HTTP::Request is up to date (6.00).

cpan[5]> install HTTP::Response
HTTP::Response is up to date (6.03).