SPARC: How to Boot a System to Run Level S (Single-User Level)

Use this procedure to boot a system that is currently at run level 0 to run level S. This run level is used for system maintenance tasks, such as backing up a file system.

1. Boot the system to run level S.

   ok boot -s

2. Type the superuser password when the following message is displayed:

   SINGLE USER MODE Root password for system maintenance (control-d to bypass): xxxxxx

3. Verify that the system is at run level S.

   # who -r

4. Perform the maintenance task that required the run level change to S.

5. After you complete the system maintenance task, type Control-D to bring the system to the multiuser state.

Example 12–2 SPARC: Booting a System to Run Level S (Single-User Level)

The following example displays the messages from booting a system to run level S.

ok boot -s
.
.
.
Sun Microsystems Inc.   SunOS 5.10 Version Generic_120012-14 32-bit
Copyright 1983-2003 Sun Microsystems, Inc.  All rights reserved.
Use is subject to license terms.
configuring IPv4 interfaces: hme0.
Hostname: starlite

SINGLE USER MODE

Root password for system maintenance (control-d to bypass): xxxxxx
single-user privilege assigned to /dev/console.
Entering System Maintenance Mode
Oct 14 15:01:28 su: 'su root' succeeded for root on /dev/console
Sun Microsystems Inc.   SunOS 5.10
# who -r
   .       run-level S  Sep 19 08:49     S      0  ?
(Perform some maintenance task)
# ^D