理解Linux中bash、terminal（编码）、export、echo

bash

GNU Bash

Wikipedia Bash

Bash Reference Manual

From GUN, Bash is the GNU Project’s shell.

Bash is the Bourne Again Shell.

Bash is an sh-compatible shell that incorporates useful features from the Koren shell(ksh) and C shell(csh).

Most sh scripts can be run by Bash without modification.

echo [-neE] [arg ...]

echo is one of the Bash builtin commands.

Output the args, separated by spaces, terminated with a newline.

The return status is 0 unless a write error occurs.

export [-fn] [-p] [name[=value]]

export is a Bourne Shell Builtins command.

From 菜鸟教程，设置或显示环境变量。export的效力仅限于本次登录操作。

-f 代表变量名称为函数名称
-n 删除指定变量，实际上并未删除，只是本次登录中后续不会再使用
-p 列出所有环境变量值
export NAME=value 定义环境变量NAME并赋值value

terminal

From ubuntu : The Linux command line for beginner， The Linux command line is a text interface to your computer. Often referred to as the shell, terminal, console, prompt or various names.