This useful VIM tutorial PDF will teach you how to use the VIM editor on a UNIX or Linux system. http://www.securitronlinux.com/arma3/vim_revisited.pdf. This one has information about the VI editor. http://www.securitronlinux.com/arma3/why-why-vi.pdf. The above image contains the VI movement commands, allowing the user to move around the text file using the keyboard quickly. And this image is …

Linux commands cheat sheet. With this list of basic Linux commands and sample usages, you’ll never have to worry about forgotten commands again. The items contained within brackets are optional, and type man at a shell for more information.

Some useful networking resources. http://www.routeralley.com/ra/docs/tcp_udp.pdf TCP and UDP reference. http://www.razorpoint.com/PDF/Rz.PortsList.pdf TCP/IP Ports listing. This is very useful for reference. http://www.gasmi.net/tcp.php Another TCP ports listing in HTML. http://www.hardwaresecrets.com/article/431 An introduction to the OSI model and how the TCP/IP  Protocol works. http://www.protocols.com/pbook/tcpip1.htm A definition of common TCP/IP names. Intro to TCP/IP. TCP/IP and subnet masking explained. Kali …