Some additional information:
root@USB-GNOME:~# efibootmgr BootCurrent: 0002 Timeout: 1 seconds BootOrder: 0002,0003,0000,0004 Boot0000* Windows Boot Manager Boot0002* ubuntu Boot0003* Trusty Thar Boot0004* UEFI: SATA SSD S5FA
root@USB-GNOME:~# efibootmgr -v ...
Boot0002* ubuntu HD(1,GPT,bd042429-ef4c-4158-8a86-ae760a4bf21b,0x800,0x3f800)/File(\EFI\ubuntu\shimx64.efi)
root@USB-GNOME:~# ls -l /boot/efi/EFI/ubuntu insgesamt 3439 -rwxr-xr-x 1 root root 126 Jun 14 11:10 grub.cfg -rwxr-xr-x 1 root root 958840 Jun 14 11:10 grubx64.efi -rwxr-xr-x 1 root root 1271672 Jun 14 11:10 MokManager.efi -rwxr-xr-x 1 root root 1289424 Jun 14 11:10 shimx64.efi
Some additional information:
root@USB-GNOME:~# efibootmgr
BootCurrent: 0002
Timeout: 1 seconds
BootOrder: 0002,0003,0000,0004
Boot0000* Windows Boot Manager
Boot0002* ubuntu
Boot0003* Trusty Thar
Boot0004* UEFI: SATA SSD S5FA
root@USB-GNOME:~# efibootmgr -v
...
Boot0002* ubuntu HD(1,GPT, bd042429- ef4c-4158- 8a86-ae760a4bf2 1b,0x800, 0x3f800) /File(\ EFI\ubuntu\ shimx64. efi)
root@USB-GNOME:~# ls -l /boot/efi/ EFI/ubuntu
insgesamt 3439
-rwxr-xr-x 1 root root 126 Jun 14 11:10 grub.cfg
-rwxr-xr-x 1 root root 958840 Jun 14 11:10 grubx64.efi
-rwxr-xr-x 1 root root 1271672 Jun 14 11:10 MokManager.efi
-rwxr-xr-x 1 root root 1289424 Jun 14 11:10 shimx64.efi