H-Sphere requires the following Perl modules on all its servers:

DBI
Digest-MD5
HTML-Parser
HTML-Tagset
LWP-ParallelUA (libwww in FreeBSD)
Mime-Base64
Net-DNS
URI
DBD-Pg
DBD-MySQL (MySQL-modules in FreeBSD)
Quota
MD5
Net
Data-ShowTable
GD-1
perl-Crypt-PasswordMD5
Crypt-Passwd

The above modules are assembled into a ready install packages and are available for public download.

We strongly recommend NOT to upgrade the modules listed above as they proved to provide the most optimal performance. However, if you decide to upgrade modules, please follow this upgrading procedure on your own risk:

1. Download the file from www.cpan.org
2. untargzip the archive
3. cd into directory
4. Compile and install the package:
   perl Makefile.PL
   make
   make install

During the upgrade, it may turn out that additional packages are required. You need to set up these packages and try the installation again. If you don't know where to get these packages, try cpan.org

Alternatively, you can update perl modules using the perl CPAN.pm module.