System hacking is the science of testing computers and network for vulnerabilities and harmful plug-ins. System hacking is itself a vast subject which consists of hacking the different software based technological systems such as laptops, desktops, etc. System hacking is defined as the compromise of computer systems and software to gain access to the target computer and steal or misuse their sensitive information. Here the malicious hacker exploits the weaknesses in a computer system or network to gain unauthorized access of its data or take illegal advantage of it.