Having recently started a new job requiring Unix skills i have managed to train myself with the aid of the following resources (below) and now am fully supporting unix web and application servers.
If you are just starting go to www.itwebz.info and look for the Linux category there you will be benefited with lots of great tutorials and information.
Well, thank you for sharing the resources, i find learning unix and linux software very interesting. Every step of is a mystery that you need to learn and discover. thanks