System Administration Guide, Volume I

Bringing a System to Run Level S (Single-User Mode)

Bug ID 1154696 has been fixed in the Solaris 7 release. This means that you can cleanly bring your system down to run level S (or single-user mode) by using the shutdown -s or the init -s command. The inittab file and the rc scripts in the /etc/init.d directory and the /etc/rcn.d directories have been modified to ensure system run level transitions are made cleanly and efficiently.