Bash

Users issue commands to their Linux systems through a command line. A user might be using a graphical interface (like GNOME) or interacting with a web server; however, even in these cases, the user is either issuing commands to Linux or providing input to a program that was started with a Linux command. Cyber operations professionals need to know how the Bash shell works, including the foundations of Bash arguments, login shells, commands, and builtins. Bash uses variables, environment variables and shell options to control its behavior. Bash also maintains a command history and supports the use of command aliasess.