I am new here and i wanna to learn Linux on system as well for infrastructure.
I dont have any info about LINUX.
Please help me with tutorial and study materials.
2nd step would be download Ubuntu apply newly acquired google-fu skills here
Linux is really fun, free and not as complex as it is made out to be. If you are an apple user- use it like your apple (Don't touch anything other than the apps) Windows users will be right at home. Unity is as useless as the start screen is on non-touch devices and Android users will complain about the POS not working after they attempted the latest most unstable version ever!
Explainshell will expand a shell command and explain it for you, piece by piece.
Also, every good linux admin / user knows how to use what are known as "man pages"
If you don't know what a command does, simply type "man <command>"
For example, if you want to know more about "ls" syntax, type "man ls", and that will bring up the manual page for said command. It's nifty, I use it almost every day
And as Slackersaid, Ubuntu's a good place to start. However, I must recommend something like Mint simply because it supports Wubi, which means you can easily install and uninstall from within windows. No messing with boot loaders and the like.