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4.5 流程控制语句和其他高级程序设计语言一样，Shell提供了用来控制程序和执行流程的命令，包括条件分支和循环结构，用户可以用这些命令创建复杂的程序。与传统语言不同的是，Shell用于指定条件值的不是布尔运算式，而是命令和字符串。4.5.1 Ifif [条件表达式] then 语句序列 ...

Linux从入门到精通（十二）——shell编程中

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Linux从入门到精通（十二）——shell编程上

shell编程1. shell和shell脚本1.1 shellShell是一种具备特殊功能的程序，它是介于使用者和UNIX/Linux操作系统之核心程序 ( kernel) 之间的一个接口。为了对用户屏蔽内核的复杂性，也为了保护内核以免用户误操作造成损害，在内核的周围建立了一个外壳( shell...

[帮助文档] Linux系统的Shell命令如何查看实例的系统配置

通过云助手，您无需逐一登录ECS实例进行运维操作，只需编写可以查询系统配置的云助手命令，并根据系统返回信息做出应对机制，例如是否继续下载或者更新软件。本文以适用于Linux系统的Shell命令为例，介绍如何查看实例的系统配置。

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更新时间 2023-04-14 09:54:44

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