In this paper Iâ„¢ve tried to aware the upcoming System programmers that in this era of Hi-Tech where concepts &things are changing every day how to be secure & also save Important confidential Data , .Iâ„¢ve learned about a large amount of system accessing and network attack tool practice in the past and here is what I consider the most common methods for gaining access to a target host. Most will notice that the attacks are not very high-tech. Unfortunately they donâ„¢t have to be, they just need to work and if you can perform all of these attacks I can guarantee a high success rate in system cracking.