Shell
Terminal
A terminal is a user interface, while a shell is running inside a terminal. Early Terminals Ear...
What is Shell
A shell is a command-line interpreter that lets you interact with the operating system by typing ...
Command History
The Mysterious ^[[A First, start a new Shell /bin/sh. /bin/sh Then enter the following command,...
Basic Operations
Default Shell echo $SHELL /bin/bash If you start a new Shell in the current terminal (e.g., sw...
Command Type
Builtin Commands Builtin commands are implemented by the Shell itself, they run without starting...
Shell Variables
Shell variables are a general term. If you are using a specific shell, such as Bash, you can call...
Subshell
The definition of Subshell in some books or materials is unclear, and the explanations often cont...