Become a Linux or Windows Administrator

How long does it take to become a Linux or Windows Administrator?

lol. Well its a little harder than that im sorry, But knowing php mysql is good, Learn a language like C. knowing C you can learn C++ Java very fast. you also wanna know HEX its very important. Linux was built on C programming if you learn all of wat i told u, Plus have a good understanding of the unix system. You should land a job. But you have to be fluent in these languages, i recommend books like = Programming in C
its wat i used to learn C and amazon.com to find used books on Hex, asm, java, c++, and so on. Good luck hope this helps