Linux › Section F · How user space starts › Topic F.7
Emergency booting and single-user mode
Sooner or later a machine will refuse to boot normally, or you will be locked out of it. Knowing the rescue options, from a minimal systemd target to a live USB stick, turns a crisis into a routine repair.
In this topic
- A ladder of recovery options
- Single-user mode, then and now
- Getting there from the boot menu
- When there is no root password
- Worked example: a bad /etc/fstab entry
- Worked example: resetting a lost root password
- Live and rescue images
- Repairing from a live image
- Common mistakes to avoid
- Key takeaways
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