Learning Kali Linux serves as an essential guide for cyber security enthusiasts and professionals keen on mastering the art of penetration testing and ethical hacking. It delves deep into the powerful features of Kali Linux, a distribution specifically designed for security professionals.

Nowadays, as many as 70 percent of websites have vulnerabilities that could lead to the theft of sensitive data of company (such as credit card information and customer info list). In particular, too many custom web applications are often not fully tested and contain a lot of undetected vulnerabilities, making them easily fall prey to hackers. There is no doubt that, the security of a website is very important, so as a website administrator, it is very necessary to conduct security penetration tests on their own servers.

Kali Linux (successor of BackTrack Linux) is a free and open-source Debian-based Linux distribution funded and maintained by Offensive Security from Switzerland. Users can boot and use this OS via hard disk, live CD or live USB anytime and anywhere. Almost all open-source tools used for digital forensics, penetration testing, ethical hacking and network security assessments are included. There is no need to prepare and maintain this Linux distribution (including gathering all those software and their dependencies) by yourself, or to install any software and save any files on Kali.

Whether you wish to be a hacker who is interested in hacking wireless network, web app, database; cracking password, software....; or want to engage in cyber security related works in the future, Offensive Security's Kali Linux (a penetration testing OS) should be always your main "battlefield" and "experimental field".

The Web Application Hacker's Handbook (WAHH for short), 2nd Edition is one of bible-level of security technology books with comprehensive, abundant and professional content highly recommended by AppNee. This second edition new added about 30% of content, mainly introduced new trends and a large number of new vulnerabilities in the field of Web security.