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使用IDE开发环境运行阿里云SDK示例和各产品SDK示例时，您需要在开发环境的系统中配置阿里云AccessKey环境变量ALIBABA_CLOUD_ACCESS_KEY_ID和ALIBABA_CLOUD_ACCESS_KEY_SECRET。本文介绍在Linux、macOS和Windows系统配置阿里...

【Hello Linux】进程优先级和环境变量（三）

main函数的参数其实我们所调用的main函数是有参数的它一共有三个参数分别是 argc argv envp其中argv是一个指针它指向一个数组里面储存的是char*类型的数据argc是一个整数它标识着argv中有效元素的个数我们可以写下下面的代码来验证我们首先来验证下argc的个数假如我们...

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【Hello Linux】进程优先级和环境变量（二）

基本概念环境变量（environment variables）一般是指在操作系统中用来指定操作系统运行环境的一些参数由于它是在操作系统中的所以一般是全局变量常见的环境变量PATH：指定命令的搜索路径HOME：指定用户的主工作目录（即用户登录到Linux系统中的默认所处目录）SHELL：当前S...

【Hello Linux】进程优先级和环境变量（一）

进程的优先级基本概念什么是进程优先级？cpu资源分配的先后顺序就是指进程的优先权（priority）优先级存在的原因？优先级存在的原因本质上是因为资源的不足在系统中表现为有多个进程却只有一个cpu如何查看优先级我们可以使用ps -l指令来查看进程其中有五个进程是比较重要的我们这里拿出来单独解释...

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