I've been a Windows geek for years. Now that I've 'grown up' I'd like to start learning Linux. I have an old Dell box with a Celeron processor that chokes on Windows XP, but should run Linux just fine (2Ghz CPU, 256mb RAM). Eventually I plan on using it as a home FTP and File Server (on Linux), but for now I just want to use it as a test platform for learning Linux.
What is a good resource, either in book for or online, that will start me off right as I know nothing about Linux. I want to learn enough to eventually get my LPI. I don't want to learn enough to pass the test, I want to really know it.
I have 4-6 hours a day at work to kill, so online resources would be great. I'd rather not read through a book all day. Is there anything online out there that will walk me through the basics, then into more advanced study? If not, what book would be ideal for a total newbie in Linux?
Any help will be greatly appreciated.