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                # 第七章 測試 ### 本章目錄 - [7.1 測試結構](07_1_test_constructs.md) - [7.2 文件測試操作](07_2_file_test_operators.md) - [7.3 其他比較操作](07_3_other_comparison_operators.md) - [7.4 嵌套 if/then 條件測試](07_4_nested_if_then_condition_tests.md) - [7.5 牛刀小試](07_5_testing_your_knowledge_of_tests.md) 每一個完備的程序設計語言都可以對一個條件進行判斷,然后根據判斷結果執行相應的指令。Bash 擁有 [`test`](http://tldp.org/LDP/abs/html/testconstructs.html#TTESTREF) 命令,[雙方括號](http://tldp.org/LDP/abs/html/testconstructs.html#DBLBRACKETS)、[雙圓括號](http://tldp.org/LDP/abs/html/testconstructs.html#DBLPARENSTST) 測試操作符以及 `if/then` 測試結構。
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