There are many Web sites that can assist you in your Linux system administration endeavors. I have listed some of the more prominent Linux-related Web sites below as they existed at the time of this writing:
Extensible Firmware Interface:
http://www.intel.com/technology/efi
Technical documentation, including most all HP documents.
Of particular interest at this site are documents on HP Linux Enablement Kit, and documents on HP Integrity servers:
http://www.docs.hp.com
Information on Itanium:
http://www.hp.com/go/itanium
Information on Integrity servers:
http://www.hp.com/go/integrity
IT Resource Center
(This is essential for every HP-UX administrator):
http://www.itrc.com
Linux kernel archive:
http://www.kernel.org
RPM home page for package managment:
http://www.rpm.org
Red Hat Linux manuals:
http://www.redhat.com/docs/manuals/
The Linux Documentation Project:
http://www.tldp.org
GNOME desktop environment site:
http://www.gnome.org/
Linux on Itanium:
http://www.gelato.org
An excellent iptables "how to" document:
http://www.linxguruz.org/iptables/howto
Software depot home page:
http://www.software.hp.com
Instant Capacity on Demand (iCOD):
http://www.hp.com/go/icod
The International Association of HP Computing Professionals:
http://www.interex.org
Register name servers at:
http://www.icann.org/registrars/accredited-list.html
Information on Perl, including sites to download Perl:
http://www.perl.com
The Perl Journal:
http://www.tpj.com
Site devoted to managing and promoting open source:
http://www.opensource.org
Linux documentation site:
http://www.linuxdoc.org
Office suite software:
http://www.openoffice.org/
Web-based management software:
http://www.webmin.com
Rute's Linux tutorial:
http://rute.2038bug.com/index.html