Operating instructions

3.1 Setting Boot Options
You can set a default boot device, boot flags, and network boot proto-
cols for Tru64 UNIX or OpenVMS using the SRM set command with en-
vironment variables. Once these environment variables are set, the
boot command defaults to the stored values. You can override the
stored values for the current boot session by entering parameters on
the boot command line.
The SRM boot-related environment variables are listed below and described in
the following sections.
auto_action
Determines the default action the system takes when the
system is power cycled, reset, or experiences a failure.
bootdef_dev
Device or device list from which booting is to be attempted
when no path is specified on the command line.
boot_file
Specifies a default file name to be used for booting when
no file name is specified by the boot command.
boot_osflags
Defines parameters (boot flags) used by the operating sys-
tem to determine some aspects of a system bootstrap.
eg*0_inet_init
Determines whether the interface’s internal Internet da-
ei*0_inet_init
tabase is initialized from NVRAM or from a network
ew*0_inet_init
server (through the bootp protocol). Set this environment
variable if you are booting Tru64 UNIX from a RIS server.
eg*0_protocols
Defines a default network boot protocol (bootp or mop).
ei*0_protocols
ew*0_protocols
3-2 DS25 Owner’s Guide