On Tue, 09.12.14 13:43, Jan Synáček (jsyna...@redhat.com) wrote: > Hello, > > what is the difference between emergency, rescue and single-user? > On F21, systemd-216-12.fc21.x86_64, they all boot into something that > presents itself as "Welcome to emergency mode!" and they all require a > root password. In case of booting into emergency.target, I can see > "Starting Emergency Shell" in the console output. In single-user and > rescue.target, I can see "Starting Rescue Shell", but they all look the > same. systemd.special(7) doesn't help much.
"rescue" is simply how we call the old sysv "single user" mode. This means all early-boot services are started, but no later boot service. File systems are hence checked, udev is started, and so on. You get your shell right after sysinit.target but before basic.target basically. "emergency" maps to the "emergency" mode that sysvinit already knew: it just starts a shell, and does nothing else. No early-boot services are run. No udev, no file system checks, no nothing. Lennart -- Lennart Poettering, Red Hat _______________________________________________ systemd-devel mailing list firstname.lastname@example.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel