红帽全球峰会6.3. 引导至救援模式
救援模式提供了一个方便的单用户环境，在此环境中，您可以在无法完成正常引导过程时修复您的系统。在救援模式下，系统会尝试挂载所有本地文件系统，并启动一些重要的系统服务。但是，它不会激活网络接口，或者允许更多的用户同时登录到系统。
流程
- 在 GRUB 引导屏幕上，按 e 键进行编辑。
在
linux行末尾添加以下参数：systemd.unit=rescue.target
systemd.unit=rescue.targetCopy to Clipboard Copied! 
按 Ctrl+x 引导至救援模式。
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