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You can take a snapshot and roll back to the previous VM state if something goes wrong.
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A VM running Kali Linux is isolated from your host OS – running Kali on a VM in an isolated environment is secure.By running multiple operating systems simultaneously (a host OS and a guest OS or multiple guests), you don’t need to reboot a computer as when using dual boot.The advantages of installing Kali Linux on VirtualBox are: Today’s blog post explores how to install Kali Linux on VirtualBox as a virtual machine (VM). In this situation, virtual machines can be of great help. At the same time, when using Kali Live DVD, settings are not saved after a system reboot. However, it is not recommended that you use Kali as a general purpose desktop operating system. Kali can be run as a Live DVD, and can be installed on a computer as a host operating system (OS) as any other Linux.
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Kali Linux, formerly known as BackTrack Linux, includes a lot of tools and applications for network audits. Kali Linux is a Debian-based Linux distribution developed for penetration testing, and is especially useful for security specialists and enthusiasts.
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