He has 19 years of experience in operating systems and middleware.
他在操作系统和中间件领域具有19年的丰富经验。
A role is a collection of users similar to groups in operating systems.
角色是用户的集合,它类似于操作系统中的组。
Managing users and groups and controlling their access is always a critical task in operating systems.
管理用户和组并控制它们的访问一直都是操作系统中一项关键任务。
Now, in the world of Linux and Unix more generally, both of which are our operating systems that had been around for many, many years, Mac OS is based on one of-- one version thereof.
在Linux和Unix里更广泛,对了,这两个都是历史悠久的,操作系统,就连Mac操作系统,都是基于它的一个版本设计出来的。
It's a little more involved on a PC but it's all free, the software you can download, and Linux in similar operating systems generally come with a compiler or you run a simple command to get it.
在PC机上有点复杂,但是它是免费的,你一般下载的软件,类似Linux的操作系统等等通常都需要,一个编译器,或者你可以运行一些简单的指令来获取。
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