As expected, attackers have begun exploiting the GNU Bash "Shellshock" remote code execution bug (CVE-2014-6271) to compromise systems and infect them with malware.
The Bash "shellshock" flaw (CVE-2014-6271) was discovered last week by Unix/Linux specialist Stephane Chazelas, and its existence was made public on Wednesday.
Offensive Security, the security training company behind Kali Linux, the popular Debian-based OS designed for digital forensics and penetration testing, and Kali community member “BinkyBear” have created another great tool for pentesters: NetHunter.
With User Mode Linux you can create virtual Linux machines within a Linux computer and use them to safely test and debug applications, network services, and even kernels.
This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter.
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