On Sat, Sep 8, 2018 at 4:02 PM Tom Horsley <horsley1953@xxxxxxxxx> wrote: > I've been trying to decrypt efibootmgr docs and I've given up :-). > > I keep getting the impression you can't examine any efi boot info > other than the one currently active which you booted from. "efibootmgr" displays the boot entries held in nvram, whether those entries refer to files that exist in the current boot or not. (The files must exist in order to be added.) > What if I want to stick a removable disk into the system and examine > the boot parameters on it? Any way to point efi tools to a completely > separate non-root disk that just happens to be plugged into the system? There are no boot parameters on the stick. But there may be an nvram boot entry pointing to an efi executable on the stick. But you don't need the stick to be plugged-in for that entry to be displayed by "efibootmgr". You can add a boot entry pointing to a file on the stick. I don't have a stick at hand, but to add the default "bootx64.efi" on my laptop: %% display boot entries %% # efibootmgr BootCurrent: 0000 Timeout: 0 seconds BootOrder: 0000,2001 Boot0000* funtoo Boot2001* EFI USB Device %% display boot entries with bootloader files %% %% "d4e17079-..." is /dev/sda1's /dev/disk/by-partuuid/ entry %% # efibootmgr -v BootCurrent: 0000 Timeout: 0 seconds BootOrder: 0000,2001 Boot0000* funtoo HD(1,GPT,d4e17079-d8a8-412b-9cc6-24950f31b263,0x800,0x82000)/File(\EFI\funtoo\shimx64.efi) Boot2001* EFI USB Device RC %% create boot entry %% # efibootmgr -c -d /dev/sda -p 1 -L fedusr -l '\EFI\Boot\bootx64.efi' BootCurrent: 0000 Timeout: 0 seconds BootOrder: 0001,0000,2001 Boot0000* funtoo Boot2001* EFI USB Device Boot0001* fedusr %% display boot entries with bootloader files %% # efibootmgr -v BootCurrent: 0000 Timeout: 0 seconds BootOrder: 0001,0000,2001 Boot0000* funtoo HD(1,GPT,d4e17079-d8a8-412b-9cc6-24950f31b263,0x800,0x82000)/File(\EFI\funtoo\shimx64.efi) Boot0001* fedusr HD(1,GPT,d4e17079-d8a8-412b-9cc6-24950f31b263,0x800,0x82000)/File(\EFI\Boot\bootx64.efi) Boot2001* EFI USB Device RC _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx
