From 6b5d2ded7f2e826dd0592568c12e0f479df2d12b Mon Sep 17 00:00:00 2001
From: winPond <db_smpond@163.com>
Date: Sat, 6 Jul 2019 11:22:24 +0800
Subject: [PATCH] README file is modified

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 # Introduction
 课程评价：**神级课程——要是早遇到，我还会是这种 five 系列**
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 课程网址：[6.828: Operating System Engineering](https://pdos.csail.mit.edu/6.828/2018/schedule.html)
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 xv6 讲义：[a simple, Unix-like teaching operating system](https://pdos.csail.mit.edu/6.828/2018/xv6/book-rev11.pdf)
 
 实现环境：