suggest me books/courses

I am new to unix world. I just know some basic commands only and some basics knowledge about unix. Anyone please suggest me from where should I start. Suggest me some book that could help me from the beginning. Presently I am working in php in a company and I want to move in unix. Please suggest me the tracks in unix also. please guide me.

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I'm new to Unix. Which books should I read? - The UNIX and Linux Forums