Hacking Unix is a new beginners guide to hacking. The first part covers basic fundamental knowledge one should know regarding the Internet, security, and Unix. The second half covers network profiling, compromises, and backdooring.
You can download it from the following link: https://packetstormsecurity.com/files/download/33743/hacking_unix_2nd-us.pdf
Source: https://packetstormsecurity.com/files/33743/hacking_unix_2nd-us.pdf.html