If you have multiple operating systems installed on your server, you need to select which one you want from the boot loader menu.
如果服务器中安装了多个操作系统，您需要从引导加载程序菜单中选择需要引导的操作系统。
One of the most straightforward ways is to create dual-boot setups, where multiple OSes are installed on a single machine, with a choice being made at startup as to which one to load.
最简单的方法就是创建一个双启动设置，即将多个操作系统装在同一台计算机上，在启动时可以选择所加载的系统。
A thin client used by multiple people should probably boot to a login screen.
由多人使用的瘦客户机应该启动到登录屏幕。
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