i have completed a course on A , N , Win7, Win serv 2008, Exc serv 2007 & CCNA.should i take up as sys admin / n/w admin / server admin

i dont have any work experience in this field. i was working in an industry as production engineer for 7 years after which my interest deviated towrds IT. i have done engineering in electrical from 2000.also can i take up Linux course & get directly into industry as Linux admin