Category Archives: Troubleshooting

Linux: Booting in single-user mode

Sometimes it might be necessary to start in single-user mode to do some administration work, or even reset an existing password. Normally this can be achieved via the GRUB boot loader. CentOS / RedHat (with root account enabled) Switch on your system. Press Esc until the GRUB menu shows up. This will bring up the… Read More »

ZFS ‘Failed to start Mark current ZSYS boot as successful’ fix

On Ubuntu 20.04 after installing the NVIDIA driver 510 metapackage the system stopped booting. It will either hang with a black screen and blinking cursor on the top left or show the following error message: Attempting to revert from a snapshot ends up with the same error message. This wasn’t the case on another separate… Read More »

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