Today I am going to write a review on kali linux that is so powerful operating system but not popular in peoples. I understand that is not user friendly to all peoples but if you try to learn it you will get a good result about your linux skills. that is an advance operating system as compare to windows and mac and others. I am using it from last two years and I feel very nice to work with it . it is more than hack proof mean that your data is more secure than other operating system. the best feature of it that I am like it it is metasploit tool .