Linux Gvim Shell variables

#!/bin/bash

Name="Matto"                    #变量名和等号之间不能有空格 #name="Blog4matto"               #重定义name变量 #readonly name                 #设置name为只读变量 # unset name                    #删除变量, you cannot delete a read-only variable #${name}                        #使用变量, and the brackets are enlarged to identify the variable boundary #

Variable type

1. Local variables: defined in script or command, valid only in the current shell instance

2. Environment variables: All programs, including shell-initiated programs can access environment variables, some programs require environment variables to ensure their normal operation, when necessary, shell scripts can also define environment variables

3.shell variable: A special variable set by the shell program, which consists of a subset of environment variables and a subset of local variables that guarantee the shell's normal operation

Linux Gvim Shell variables