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3.1.4
boot_osflags
The boot_osflags environment variable sets the default boot flags and, for OpenVMS, a
root number.
Boot flags contain information used by the operating system to determine some aspects of a
system bootstrap. Under normal circumstances, you can use the default boot flag settings.
To change the boot flags for the current boot only, use the –flags option with the boot
command.
The syntax is:
set boot_osflags flags_value
The flags_value argument is specific to the operating system.
Tru64 UNIX Systems
Tru64 UNIX systems take a single ASCII character as the flags_value argument.
a Load operating system software from the specified boot device (autoboot). Boot to
multi-user mode.
i Prompt for the name of a file to load and other options (boot interactively). Boot to
single-user mode.
s Stop in single-user mode. Boots /vmunix to single-user mode and stops at the # (root)
prompt.
D Full dump; implies "s" as well. By default, if Tru64 UNIX crashes, it completes a
partial memory dump. Specifying "D" forces a full dump at system crash.
Example
The following setting will autoboot Tru64 UNIX to multi-user mode when you enter the
boot command.
>>> set boot_osflags a
Booting and Installing an Operating System
3-7
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Troubleshooting
