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9 lines
217 B
Bash
9 lines
217 B
Bash
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#!/usr/bin/env bash
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username="Zhang Peng" ### 声明变量
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echo ${username} ### 输出变量的值
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unset username ### 删除变量
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echo ${username} ### 输出为空
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export HELLO="Hello World" ### 输出环境变量
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