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IP属地：重庆
Simple Commands 常用指令 ls 显示文件或目录 -l 列出文件详细信息l(list) -a 列出当前目录...
What is Unix Unix is a Multi-user, multi-process and multi-access operat...
Preemptive Multitasking(抢占式多任务处理) 在单cpu的系统里，同一时间只能有一个进程运行，在进程切换的时候，kerne...
What is process? Process can be seen as a dynamic instance of program, o...
首先，先说说什么是操作系统。 What is operating system? Anoperating system(OS) issystem...