Usually use a virtual machine too often lead to forget your password, two links here to share, corresponding to a method 08R2 and 12R2 to reset the password.
08R2:http://ucweb.blog.51cto.com/4042188/962284
12R2:http://jingyan.baidu.com/album/5225f26b7e1c44e6fa090814.html?picindex=4&qq-pf-to=pcqq.c2c
The only thing needed is the corresponding system installation package.
Reproduced in: https: //www.cnblogs.com/VicTang/p/4799539.html