HP DS20L - Manual (Page 139)

SRM Console A-51
A.20.8 os_type
The os_type environment variable specifies the default operating system.
This variable is set at the factory to the setting for the operating system
purchased. Use this command to change the factory default setting.
Whenever you change the value of os_type, you must reset the system by
pressing the Halt button or issuing the initialize command.
Syntax: set os_type os_type
where os_type can be:
unix Tru64 UNIX is the default operating system, and the SRM
firmware is started during power-up or reset.
linux Linux is the default operating system, and the SRM firmware is
started during power-up or reset.
A.20.9 password
Sets or clears the console password stored in NVRAM.
Syntax: set password
where the password is not an argument to the set password command; the
console prompts the user for the string, which must be between 15 and 30
characters.