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树莓派 Cannot open access to console. The root account is locked

 4 years ago
source link: https://www.tuicool.com/articles/bmq6n2m
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前序文章：

昨晚把两块硬盘组成可扩容的lvm盘，挂载信息写入到了 /etc/fstab 中。今天发现机器莫名其妙的重启过，更糟糕的是无法进入系统，屏幕上出现如下错误： 

you are in emergency mode. after logging in, type "journalctl -xb" to view system logs, "systemctl reboot" to reboot, "systemctl default" or ^d to try again to boot into default mode.

cannot open access to console, the root account is locked.
see sulogin(8) man page for more details.

press enter to continue.

emergency-mode-1024x768.jpg

按回车系统试图正常启动，可惜最终还是失败。断电重启多次不能解决这个问题。

根据网上信息，大概是fstab信息有问题，导致 /boot 分区和根目录无法正常加载。于是和重置密码 文中一样操作， init=/bin/sh 进入root环境。

先将/boot分区重新挂载：

mount -o remount,rw /dev/mmcblk0p1 /boot

提示boot分区并未加载。用 ls /boot 查看，空空如也。于是先挂载： mount /dev/mmcblk0p1 /boot ，再次用 ls 查看，OK问题解决。

接着重新挂载根目录： mount -o remount,rw /dev/mmcblk0p2 / 。根目录可写后，编辑 /etc/fstab 文件，将引起问题的挂载点注释掉。

然后执行 exec /sbin/init 启动系统，这次终于正常进入系统了。

按惯例，启动后把 /boot/cmdline.txt 文件中的 init=/bin/sh 删除，避免下次又进入root环境。

参考

  1. https://samx18.io/blog/2017/11/05/piBootIssue.html

report

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