bash 从命令行参数设置变量

bash set variable from commandline argument

提问by user3116685

cat ./1.sh

猫./1.sh

#!/bin/bash
echo 
set var1 = 
echo var1 is $var1

kostas@elem:~/1$ argument1 var1 is

kostas@elem:~/1$ argument1 var1 是

How to set var1 from first commandline argument?

如何从第一个命令行参数设置 var1？

回答by chepner

The correct assignment is simply the following, with no spaces on either side of the equal sign:

正确的赋值如下，等号两边没有空格：

var1=

The command set var1 = $1actually does the following:

该命令set var1 = $1实际上执行以下操作：

1. Sets the value of $1to "var1"
2. Sets the value of $2to "="
3. Sets the value of $3to the original first parameter $1.

1. 将 的值设置$1为“var1”
2. 将 的值设置$2为“=”
3. 将 的值设置为$3原始第一个参数$1。