HP 9000 V2500 SCA, Operator'S Manual

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130 Chapter 6
HP-UX Operating System
Stopping HP-UX
Stopping HP-UX
This section provides a brief overview of the process; for complete
instructions, see Managing Systems and Workgroups. Additional
information is contained in the V2500/V2600 SCA HP-UX System
Guide.
Typically, the system is shut down to:
• Put it in single-user state so that the system can be updated or to
check file systems.
• Turn it off in order to perform a task such as installing a new disk
drive.
CAUTION Never stop the system by turning off the power. Stopping the system
improperly can corrupt the file system. Use the
shutdown
or
reboot
commands.
Shutdown considerations
Only the system administrator or a designated superuser can shut down
the system.
The
/sbin/shutdown
command:
• Warns all users to log out of the system within a grace period you
specify
• Halts daemons
• Kills unauthorized processes
• Unmounts file systems
• Puts the system in single-user mode
• Writes the contents of the I/O buffers to a disk
CAUTION Do not run
shutdown
from a remote system via
rlogin
if a network
service is used. The shutdown process logs the user out prematurely and
returns control to the console. Run
shutdown
from the sppconsole
window on the SSP.