Is it possible to 'install' an operating system by putting the EFI/boot & system files in the right...
If I were to partition a /dev/sdb1, place all the needed root/home files, then go to my own /boot/efi folder and put the files there with whatever UUID I need, would it then be bootable?
uefi
asked 1 hour ago
avisitoritseemsavisitoritseems
749
add a comment |
If I were to partition a /dev/sdb1, place all the needed root/home files, then go to my own /boot/efi folder and put the files there with whatever UUID I need, would it then be bootable?
uefi
asked 1 hour ago
avisitoritseemsavisitoritseems
749
No, because you'll also need a bootloader like grub or uboot.
– mikewhatever
59 mins ago
I suspected it was yes, so tried & failed. I suspected I hadn't got it right, but decided it wasn't worth the effort & installed normally (so I defer to mikewhatever's prior comment)
– guiverc
54 mins ago
Well I've got rEFInd, a USB with recovery, an empty NTFS partition and a lot of frustration. Noted on needing a bootloader, I think I can try taking it from a VM or the USB.
– avisitoritseems
30 mins ago
add a comment |
If I were to partition a /dev/sdb1, place all the needed root/home files, then go to my own /boot/efi folder and put the files there with whatever UUID I need, would it then be bootable?
uefi
asked 1 hour ago
avisitoritseemsavisitoritseems
749
If I were to partition a /dev/sdb1, place all the needed root/home files, then go to my own /boot/efi folder and put the files there with whatever UUID I need, would it then be bootable?
uefi
uefi
asked 1 hour ago
avisitoritseemsavisitoritseems
749
asked 1 hour ago
avisitoritseemsavisitoritseems
749
asked 1 hour ago
avisitoritseemsavisitoritseems
749
asked 1 hour ago
avisitoritseemsavisitoritseems
749
asked 1 hour ago
avisitoritseemsavisitoritseems
749
749
No, because you'll also need a bootloader like grub or uboot.
– mikewhatever
59 mins ago
I suspected it was yes, so tried & failed. I suspected I hadn't got it right, but decided it wasn't worth the effort & installed normally (so I defer to mikewhatever's prior comment)
– guiverc
54 mins ago
Well I've got rEFInd, a USB with recovery, an empty NTFS partition and a lot of frustration. Noted on needing a bootloader, I think I can try taking it from a VM or the USB.
– avisitoritseems
30 mins ago
add a comment |
No, because you'll also need a bootloader like grub or uboot.
– mikewhatever
59 mins ago
I suspected it was yes, so tried & failed. I suspected I hadn't got it right, but decided it wasn't worth the effort & installed normally (so I defer to mikewhatever's prior comment)
– guiverc
54 mins ago
Well I've got rEFInd, a USB with recovery, an empty NTFS partition and a lot of frustration. Noted on needing a bootloader, I think I can try taking it from a VM or the USB.
– avisitoritseems
30 mins ago
No, because you'll also need a bootloader like grub or uboot.
– mikewhatever
59 mins ago
No, because you'll also need a bootloader like grub or uboot.
– mikewhatever
59 mins ago
I suspected it was yes, so tried & failed. I suspected I hadn't got it right, but decided it wasn't worth the effort & installed normally (so I defer to mikewhatever's prior comment)
– guiverc
54 mins ago
I suspected it was yes, so tried & failed. I suspected I hadn't got it right, but decided it wasn't worth the effort & installed normally (so I defer to mikewhatever's prior comment)
– guiverc
54 mins ago
Well I've got rEFInd, a USB with recovery, an empty NTFS partition and a lot of frustration. Noted on needing a bootloader, I think I can try taking it from a VM or the USB.
– avisitoritseems
30 mins ago
Well I've got rEFInd, a USB with recovery, an empty NTFS partition and a lot of frustration. Noted on needing a bootloader, I think I can try taking it from a VM or the USB.
– avisitoritseems
30 mins ago
add a comment |
1 Answer
1
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oldest
votes
Yes, the "right place" being an EFI FAT partition for the shimx64.efi and grubx64.efi bootloaders, along with the grub.cfg (all in EFI/ubuntu, and copies in /EFI/Boot with shimx64.efi renamed to bootx64.efi. Your root should be on an ext4 partition. The only UUID change needed is in the EFI partition's grub.cfg file to use the root of your system (assuming you just copied the whole EFI from another system. It's really pretty simple, and will even boot a legacy install of the root this way (not secure boot, but UEFI). Surprisingly, even the legacy /boot/grub/grub.cfg will work for a UEFI boot. You can add the /boot/efi and fstab entry for mounting the EFI, but that would only be needed if you tried to update shim/grub, (assuming you have the efi versions of the packages). I've been running a disk set up this way (legacy install, UEFI files added from another system) for years without issue. I did add the /boot/efi and fstab entry, but never bothered with the shi9m/grub efi package change.
answered 45 mins ago
ubfan1ubfan1
9,54141629
add a comment |
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1 Answer
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1 Answer
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oldest
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Yes, the "right place" being an EFI FAT partition for the shimx64.efi and grubx64.efi bootloaders, along with the grub.cfg (all in EFI/ubuntu, and copies in /EFI/Boot with shimx64.efi renamed to bootx64.efi. Your root should be on an ext4 partition. The only UUID change needed is in the EFI partition's grub.cfg file to use the root of your system (assuming you just copied the whole EFI from another system. It's really pretty simple, and will even boot a legacy install of the root this way (not secure boot, but UEFI). Surprisingly, even the legacy /boot/grub/grub.cfg will work for a UEFI boot. You can add the /boot/efi and fstab entry for mounting the EFI, but that would only be needed if you tried to update shim/grub, (assuming you have the efi versions of the packages). I've been running a disk set up this way (legacy install, UEFI files added from another system) for years without issue. I did add the /boot/efi and fstab entry, but never bothered with the shi9m/grub efi package change.
answered 45 mins ago
ubfan1ubfan1
9,54141629
add a comment |
Yes, the "right place" being an EFI FAT partition for the shimx64.efi and grubx64.efi bootloaders, along with the grub.cfg (all in EFI/ubuntu, and copies in /EFI/Boot with shimx64.efi renamed to bootx64.efi. Your root should be on an ext4 partition. The only UUID change needed is in the EFI partition's grub.cfg file to use the root of your system (assuming you just copied the whole EFI from another system. It's really pretty simple, and will even boot a legacy install of the root this way (not secure boot, but UEFI). Surprisingly, even the legacy /boot/grub/grub.cfg will work for a UEFI boot. You can add the /boot/efi and fstab entry for mounting the EFI, but that would only be needed if you tried to update shim/grub, (assuming you have the efi versions of the packages). I've been running a disk set up this way (legacy install, UEFI files added from another system) for years without issue. I did add the /boot/efi and fstab entry, but never bothered with the shi9m/grub efi package change.
answered 45 mins ago
ubfan1ubfan1
9,54141629
add a comment |
Yes, the "right place" being an EFI FAT partition for the shimx64.efi and grubx64.efi bootloaders, along with the grub.cfg (all in EFI/ubuntu, and copies in /EFI/Boot with shimx64.efi renamed to bootx64.efi. Your root should be on an ext4 partition. The only UUID change needed is in the EFI partition's grub.cfg file to use the root of your system (assuming you just copied the whole EFI from another system. It's really pretty simple, and will even boot a legacy install of the root this way (not secure boot, but UEFI). Surprisingly, even the legacy /boot/grub/grub.cfg will work for a UEFI boot. You can add the /boot/efi and fstab entry for mounting the EFI, but that would only be needed if you tried to update shim/grub, (assuming you have the efi versions of the packages). I've been running a disk set up this way (legacy install, UEFI files added from another system) for years without issue. I did add the /boot/efi and fstab entry, but never bothered with the shi9m/grub efi package change.
answered 45 mins ago
ubfan1ubfan1
9,54141629
Yes, the "right place" being an EFI FAT partition for the shimx64.efi and grubx64.efi bootloaders, along with the grub.cfg (all in EFI/ubuntu, and copies in /EFI/Boot with shimx64.efi renamed to bootx64.efi. Your root should be on an ext4 partition. The only UUID change needed is in the EFI partition's grub.cfg file to use the root of your system (assuming you just copied the whole EFI from another system. It's really pretty simple, and will even boot a legacy install of the root this way (not secure boot, but UEFI). Surprisingly, even the legacy /boot/grub/grub.cfg will work for a UEFI boot. You can add the /boot/efi and fstab entry for mounting the EFI, but that would only be needed if you tried to update shim/grub, (assuming you have the efi versions of the packages). I've been running a disk set up this way (legacy install, UEFI files added from another system) for years without issue. I did add the /boot/efi and fstab entry, but never bothered with the shi9m/grub efi package change.
answered 45 mins ago
ubfan1ubfan1
9,54141629
answered 45 mins ago
ubfan1ubfan1
9,54141629
answered 45 mins ago
ubfan1ubfan1
9,54141629
answered 45 mins ago
ubfan1ubfan1
9,54141629
9,54141629
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No, because you'll also need a bootloader like grub or uboot.
– mikewhatever
59 mins ago
I suspected it was yes, so tried & failed. I suspected I hadn't got it right, but decided it wasn't worth the effort & installed normally (so I defer to mikewhatever's prior comment)
– guiverc
54 mins ago
Well I've got rEFInd, a USB with recovery, an empty NTFS partition and a lot of frustration. Noted on needing a bootloader, I think I can try taking it from a VM or the USB.
– avisitoritseems
30 mins ago