I am really from a different background , not very much familar with Linux Operating System , just learnt few basic of linux operations and its file system. I really wanna switch my carrer to Hadoop Admin . Please let me know in real world how much one should be familar with Linux . During a training for Hadoop admin they told me that If I know how to work on few basic linux operating system that should be fine . My question when it comes to Hadoop admin interview , how much one should u be preapred for Linux Os in the work enviroment . Please let me know .