Intro TCP/IP swiss army knife Netcat is a simple unix utility which reads and writes data across network connections, using TCP or UDP protocol. It is designed to be a reliable “back-end” tool that can be used directly or easily driven by other programs and scripts. At the same time, it is a feature-rich network… Continue reading Netcat


Intro What is a shell? Simply put, the shell is a program that takes commands from the keyboard and gives them to the operating system to perform. On most Linux systems a program called sh (which stands for Bourne Shell, an enhanced version of the original Unix shell program, sh, written by Steve Bourne) acts as the shell… Continue reading Shells