thing to read

lvm :
http://linuxhelp.blogspot.com/2005/04/creating-lvm-in-linux.html
http://linuxconfig.org/Linux_lvm_-_Logical_Volume_Manager
http://tuxradar.com/content/lvm-made-easy

linux system admin stuff imp :
http://www.yolinux.com/TUTORIALS/LinuxTutorialSysAdmin.html