Kali Linux 前身是 BackTrack ，是一个基于 Debian 的 Linux 发行版，包含很多安全和取证方面的相关工具。支持 ARM架构。
官方的Kali2.0介绍
1.将会保持滚动升级。
这是Kali 2.0最重要的更新，滚动升级的方式将会保证Debian的稳定性，同时保证Kali自身是个强有力的工具。
2.不断更新工具，工作流程将会极大增强。
3.Kali2.0的新史诗级皮肤
Kali2.0现在原生支持KDE, GNOME3, Xfce, MATE, e17, lxde ， i3wm这些桌面。你不在需要忍受难看的界面了。
增加了对多级菜单，真正的终端定制的透明支持，以及一点点有用的GNOME Shell扩展。
当然，这已经付出了代价 - 一个完整的GNOME 3版本的最低内存要求的提高到768 MB。
对于绝大部分人，硬件上不成问题，但可能对于那一小部分低端机会有一些问题。
出于这个原因，我们也发布了官方的精简Kali2.0 ISO。
4.更新VMWare和VirtualBox的镜像
更加具体的更新介绍
0.第一个基于Debian Jessie的Kali版本，内核升级至4.0。
1.多任务处理(多工作空间)
2.重新设计的用户界面
3.重组菜单和工具分类.
4.核心工具集会保持每周滚动更新。用户可以通过手动或自动更新。
5.Metasploit加载更快（本地化的Ruby2.0）
6.使用消息通知
7.内置显示切换
8.无线测试工具更加全面丰富
9.VMWare和VirtualBox镜像
We’re still buzzing and recovering from the Black Hat and DEF CON conferences where we finished presenting our new Kali Linux Dojo, which was a blast. With the help of a few good people, the Dojo rooms were set up ready for the masses – where many generated their very own Kali 2.0 ISOs for the first time. But the excitement doesn’t end for us just yet. With the end of the cons, we now find ourselves smack in the middle of the most significant release of Kali since 2013. Today is the day that Kali 2.0 is officially released.
So, what’s new in Kali 2.0? There’s a new 4.0 kernel, now based on Debian Jessie, improved hardware and wireless driver coverage, support for a variety of Desktop Environments (gnome, kde, xfce, mate, e17, lxde, i3wm), updated desktop environment and tools – and the list goes on. But these bulletpoint items are essentially a side effect of the real changes that have taken place in our development backend. Ready to hear the real news? Take a deep breath, it’s a long list.