HP-UX System Administrator's Guide: Routine Management Tasks

vmunix” which references the file vmunix in the /stand file system on the selected
boot device.
If you normally boot from the kernel file /stand/vmunix but (for example) need to
temporarily boot from an alternate kernel file, follow this procedure substituting your
kernel file name for testvmunix:
1. If your system automatically boots, interrupt the autoboot sequence by hitting any
key on the console keyboard during the autoboot (time-out) delay.
2. Select EFI Shell [Built-in] from the boot options menu to start the EFI shell.
3. Make sure the selected boot device is the one that contains the kernel file you want
to boot from. If you are not sure:
a. Enter map at the EFI shell prompt to list bootable devices on your system.
The devices will be listed with entries that begin with fs#: (where # is a
number such as 0, 1, 2, 3, etc.). For example:
fs0 : Acpi(HWP0002,500)/Pci(2|0)/Ata(Primary,Master)/HD(Part1,Sig88F40A3A-B992-11E1-8002-D6217B60E588)
fs1 : Acpi(HWP0002,500)/Pci(2|0)/Ata(Primary,Master)/HD(Part3,Sig88F40A9E-B992-11E1-8004-D6217B60E588)
blk0 : Acpi(HWP0002,500)/Pci(2|0)/Ata(Primary,Master)
blk1 : Acpi(HWP0002,500)/Pci(2|0)/Ata(Primary,Master)/HD(Part1,Sig88f40A3A-B992-11E1-8002-D6217B60E588)
blk2 : Acpi(HWP0002,500)/Pci(2|0)/Ata(Primary,Master)/HD(Part1,Sig88f40A6C-B992-11E1-8003-D6217B60E588)
blk4 : Acpi(HWP0002,500)/Pci(2|0)/Ata(Secondary,Master)
b. Determine which entry maps to the device containing the kernel file you are
trying to boot from, and enter the fs#: name at the shell prompt.
For example, if the entry for the device you want to boot from is tagged as
“fs7:”, enter fs7: at the shell prompt:
Shell> fs7:
The device associated with entry fs7: is now the selected boot device.
4. Enter the command hpux at the shell prompt and be prepared to stop the autoboot
sequence (again by hitting any key on the console keyboard) if you see a countdown
timer showing that an autoboot is about to commence.
NOTE: If the AUTO file on the now selected boot device will cause the system to
boot from the alternate kernel file you are trying to use, there is no need to interrupt
this second autoboot sequence. Otherwise, stop the automatic boot.
5. If you stopped the automatic boot in the previous step you should now be in the
HP-UX boot loader; the prompt should now be “HPUX>”.
At the boot loader prompt, enter the command boot filename where filename
is the name of the kernel file you are trying to boot from.
Example 2-7 Booting from an alternate kernel file called “testvmunix”
HPUX> boot testvmunix
Booting Systems 45