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【linux 脚本篇】流程控制语句-case

用来实现程序流程的选择、循环等进行控制，类似于if，但更具准确性，一般用于服务的启动、停止脚本。语法格式如下：1. case 变量 in 2. 变量1） 3. 命令序列1;; 4. 变量2） 5. 命令序...

【Linux脚本篇】流程控制语句-if

在shell脚本应用中，if语句是最为常用的一种流程控制方式，用来根据特定的条件测试结果，分别执行不同的操作（如果......那么......）。根据不同的复杂程度，if语句的选择结构可以分为三种基本类型...

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[帮助文档] 如何通过脚本文件自动更新Linux实例中的软件源

概述本文主要介绍通过脚本文件更新Linux实例中的软件源的方法。详细信息阿里云提醒您：如果您对实例或数据有修改、变更等风险操作，务必注意实例的容灾、容错能力，确保数据安全。如果您对实例（包括但不限于ECS、RDS）等进行配置与数据修改，建议提前创建快照或开启RDS日志备份等功能。如果您在阿里云平台授...

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