Installation guide

To return to multiuser mode from single-user mode, use Ctrl/d or enter
exit at the prompt. This causes the init command as process 1 to prompt
you for the run level. In response to the prompt, enter 2 to return to
multiuser mode without networking daemons activated, or enter 3 to
return to multiuser mode with networking daemons activated.
Alternatively, you can reboot the system by using one of the following
commands:
# /usr/sbin/shutdown -r now
# /sbin/reboot
3.5.2.3 Reexamining the inittab File
To reexamine the inittab file, enter the init command with the q
argument, as follows:
# init q
In response, init reexamines the inittab file and starts new processes, if
necessary. For example, if you recently added new terminal lines, init
activates the getty process for these terminal lines in response to the
init q command.
Refer to the getty
(8) reference page for further information about the
relationship between terminal lines and the init command.
3.6 Symmetric Multiprocessing
Symmetric MultiProcessing (SMP) consists of two or more processors that
execute the same copy of the operating system, address common memory,
and can execute instructions simultaneously. In a multiprocessor system,
multiple threads can run concurrently through simultaneous execution on
multiple processors.
If your system is a multiprocessor system and it is running Tru64 UNIX, it
is running in an SMP environment. The objective of the operating system
in an SMP environment is to take advantage of the incremental computes
available to the system as additional processors are added. To do this, the
operating system must allow multiple threads of execution to operate
concurrently across the available processors.
From a system administrator’s point of view, this additional computing
power requires little to no additional system management work. All the
administrator should see is additional available computes. It may be that
Starting Up and Shutting Down the System 3–13