Here lies a collection of documents describing configuration of technology I've used in recent memory that I don't want to forget in my old age. Perhaps something here would be useful to you as well. Or take a look at my transient thoughts on technology…
Installation - Instructions and configuration tips
QEMU-KVM - qemu 0.10 with built in kvm support plus tun/bridge virtual networking
Xen host (dom0) - setting up a Xen dom0 on Ubuntu 8.04 LTS
Xen guest (domU) - installing Ubuntu guests in Xen
Web server - configuration of an Apache web server with MySQL and PHP5
RoundCube - installing RoundCube webmail
OpenLDAP server - how to set up an OpenLDAP server
OpenLDAP client - how to set up LDAP authentication
ISCSI - basic ISCSI usage guide
debootstrap - installation of Ubuntu using debootstrap
Hardware Check - How to check out hardware with an Ubuntu LiveCD
ZFS basics - how to use the amazing ZFS filesystem/volume manager
Solaris 10 Install - installation and setup of a Solaris 10 server with ZFS root filesystem
Coolstack SAMP - install and configure Coolstack Apache, MySQL, PHP/Perl server
Munin Node - set up munin to allow monitoring from a central location