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Red Hat Certified System Administrator EX200 (RHEL 10) · Domain 4: Operate running systems

Booting into different targets manually from the GRUB menu (systemd.unit=rescue.target, emergency.target)

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Last reviewed September 25, 2026 · Leer en español

Sometimes a system will not boot normally: a bad /etc/fstab entry, a broken service or a forgotten password. Rather than reinstalling, you can tell systemd to start a smaller, more basic target for one boot only, by editing the kernel command line in the GRUB 2 boot loader menu. This is a key troubleshooting skill and a likely exam task.

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