There are a lot of guides around on wikis and forum posts that coherently walk you through manually editing your GRUB boot file to select the OS – just try Google.
在维基和各种论坛里，很多帖子给出了方法，号称能够让你条理清晰的手动更改你的GRUN启动文件从而达到选择默认操作系统的目的——去Google一下遍地都是。
On the next panel, select option 1 to accept the license agreement for Tivoli Monitoring Linux OS Agent.
在下一个面板中，选择选项1以接受Tivoli Monitoring Linux OS Agent的许可协议。
If you need to access the machine in single-user mode (giving you root access without specifying a password!), select the Linux OS at the GRUB main screen.
如果需要以单用户模式访问机器(不需要指定口令就能够让您获得root访问权限！)，那么在grub主屏幕上选择Linux OS。
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