Introduction to Linux

Vi Editor:
  http://www.epcc.ed.ac.uk/tracs/vi.html
   
Apache Web Server:
  http://www.linuxdoc.org/HOWTO/Apache-Overview-HOWTO.html
   
Virtual Hosting:
  http://httpd.apache.org/docs/vhosts/
   
Bash Programming:
  http://www.linuxdoc.org/HOWTO/Adv-Bash-Scr-HOWTO/
   
Red Hat Linux:
  http://www.redhat.com/
   
Certification:
  http://www.brainbench.com/
  http://www.lpi.org/
  http://www.linuxcertification.com/
  http://www.redhat.com/training/rhce/courses/