How to reinstall grub from a liveUSB if the / partition is encrypted and there is a separate /boot partition?
I found few threads that explain how to reinstall grub2 by the mean of chroot but none of them explain how to proceed if my / is encrypted and if there is a plain /boot partition. Thing is I installed Debian in EFI mode and it made an unbootable entry (Japanese character) in the UEFI boot menu.
I tried to make a new entry using efibootmgr from Ubuntu liveUSB but it is still unbootable. I'd like to reinstall grub from Ubuntu liveUSB but I don't know to chroot the encrypted / partition and how the separate /boot partition blends in.
boot grub2 uefi reinstall
edited Jan 3 '17 at 15:51
Thomas W.
13415
asked Jan 10 '16 at 11:29
ChiseledAbs
12615
add a comment |
I found few threads that explain how to reinstall grub2 by the mean of chroot but none of them explain how to proceed if my / is encrypted and if there is a plain /boot partition. Thing is I installed Debian in EFI mode and it made an unbootable entry (Japanese character) in the UEFI boot menu.
I tried to make a new entry using efibootmgr from Ubuntu liveUSB but it is still unbootable. I'd like to reinstall grub from Ubuntu liveUSB but I don't know to chroot the encrypted / partition and how the separate /boot partition blends in.
boot grub2 uefi reinstall
edited Jan 3 '17 at 15:51
Thomas W.
13415
asked Jan 10 '16 at 11:29
ChiseledAbs
12615
Given your configuration, you might want to try my rEFInd boot manager, which tends to handle multi-distribution configurations better than GRUB. Try downloading the USB flash drive or CD-R version to see if it will boot both Debian and Ubuntu. (You may need to add extra boot options to identify your root filesystem by pressing F2 or Delete twice to boot Ubuntu.) If it works, you can install the PPA from Ubuntu or the Debian package in either Debian or Ubuntu.
– Rod Smith
Jan 10 '16 at 15:16
add a comment |
I found few threads that explain how to reinstall grub2 by the mean of chroot but none of them explain how to proceed if my / is encrypted and if there is a plain /boot partition. Thing is I installed Debian in EFI mode and it made an unbootable entry (Japanese character) in the UEFI boot menu.
I tried to make a new entry using efibootmgr from Ubuntu liveUSB but it is still unbootable. I'd like to reinstall grub from Ubuntu liveUSB but I don't know to chroot the encrypted / partition and how the separate /boot partition blends in.
boot grub2 uefi reinstall
edited Jan 3 '17 at 15:51
Thomas W.
13415
asked Jan 10 '16 at 11:29
ChiseledAbs
12615
I found few threads that explain how to reinstall grub2 by the mean of chroot but none of them explain how to proceed if my / is encrypted and if there is a plain /boot partition. Thing is I installed Debian in EFI mode and it made an unbootable entry (Japanese character) in the UEFI boot menu.
I tried to make a new entry using efibootmgr from Ubuntu liveUSB but it is still unbootable. I'd like to reinstall grub from Ubuntu liveUSB but I don't know to chroot the encrypted / partition and how the separate /boot partition blends in.
boot grub2 uefi reinstall
boot grub2 uefi reinstall
edited Jan 3 '17 at 15:51
Thomas W.
13415
asked Jan 10 '16 at 11:29
ChiseledAbs
12615
edited Jan 3 '17 at 15:51
Thomas W.
13415
asked Jan 10 '16 at 11:29
ChiseledAbs
12615
edited Jan 3 '17 at 15:51
Thomas W.
13415
edited Jan 3 '17 at 15:51
Thomas W.
13415
edited Jan 3 '17 at 15:51
Thomas W.
13415
13415
asked Jan 10 '16 at 11:29
ChiseledAbs
12615
asked Jan 10 '16 at 11:29
ChiseledAbs
12615
asked Jan 10 '16 at 11:29
ChiseledAbs
12615
12615
Given your configuration, you might want to try my rEFInd boot manager, which tends to handle multi-distribution configurations better than GRUB. Try downloading the USB flash drive or CD-R version to see if it will boot both Debian and Ubuntu. (You may need to add extra boot options to identify your root filesystem by pressing F2 or Delete twice to boot Ubuntu.) If it works, you can install the PPA from Ubuntu or the Debian package in either Debian or Ubuntu.
– Rod Smith
Jan 10 '16 at 15:16
add a comment |
Given your configuration, you might want to try my rEFInd boot manager, which tends to handle multi-distribution configurations better than GRUB. Try downloading the USB flash drive or CD-R version to see if it will boot both Debian and Ubuntu. (You may need to add extra boot options to identify your root filesystem by pressing F2 or Delete twice to boot Ubuntu.) If it works, you can install the PPA from Ubuntu or the Debian package in either Debian or Ubuntu.
– Rod Smith
Jan 10 '16 at 15:16
Given your configuration, you might want to try my rEFInd boot manager, which tends to handle multi-distribution configurations better than GRUB. Try downloading the USB flash drive or CD-R version to see if it will boot both Debian and Ubuntu. (You may need to add extra boot options to identify your root filesystem by pressing F2 or Delete twice to boot Ubuntu.) If it works, you can install the PPA from Ubuntu or the Debian package in either Debian or Ubuntu.
– Rod Smith
Jan 10 '16 at 15:16
Given your configuration, you might want to try my rEFInd boot manager, which tends to handle multi-distribution configurations better than GRUB. Try downloading the USB flash drive or CD-R version to see if it will boot both Debian and Ubuntu. (You may need to add extra boot options to identify your root filesystem by pressing F2 or Delete twice to boot Ubuntu.) If it works, you can install the PPA from Ubuntu or the Debian package in either Debian or Ubuntu.
– Rod Smith
Jan 10 '16 at 15:16
add a comment |
1 Answer
1
active
oldest
votes
Try this:
Boot from an Ubuntu Live USB with a working connection to the internet.
Open a Terminal window (Applications ---- Accessories ---- Terminal).
Type the following commands:
sudo -i
apt-get update
apt-get install cryptsetup lvm2
fdisk -l
cryptsetup luksOpen /dev/sda? TAG #sda? is your root partition
vgchange -ay
vgscan
vgchange -ay [VOLUME GROUP NAME]
lvscan
/dev/[VOLUME GROUP NAME]/[LOGICAL VOLUME NAME] /mnt
modprobe efivars
mount /dev/sda? /mnt/boot/efi #sda? is your efi partition
mount --bind /dev /mnt/dev
mount --bind /dev/pts /mnt/dev/pts
mount --bind /proc /mnt/proc
mount --bind /sys /mnt/sys
cp /etc/resolv.conf /mnt/etc/
chroot /mnt
apt-get install --reinstall grub-efi-amd64
or
apt-get install --reinstall grub-efi
update-grub
umount /mnt
vgchange -an
cryptsetup luksClose TAG
answered Jan 10 '16 at 15:25
kyodake
9,65011932
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Try this:
Boot from an Ubuntu Live USB with a working connection to the internet.
Open a Terminal window (Applications ---- Accessories ---- Terminal).
Type the following commands:
sudo -i
apt-get update
apt-get install cryptsetup lvm2
fdisk -l
cryptsetup luksOpen /dev/sda? TAG #sda? is your root partition
vgchange -ay
vgscan
vgchange -ay [VOLUME GROUP NAME]
lvscan
/dev/[VOLUME GROUP NAME]/[LOGICAL VOLUME NAME] /mnt
modprobe efivars
mount /dev/sda? /mnt/boot/efi #sda? is your efi partition
mount --bind /dev /mnt/dev
mount --bind /dev/pts /mnt/dev/pts
mount --bind /proc /mnt/proc
mount --bind /sys /mnt/sys
cp /etc/resolv.conf /mnt/etc/
chroot /mnt
apt-get install --reinstall grub-efi-amd64
or
apt-get install --reinstall grub-efi
update-grub
umount /mnt
vgchange -an
cryptsetup luksClose TAG
answered Jan 10 '16 at 15:25
kyodake
9,65011932
add a comment |
Try this:
Boot from an Ubuntu Live USB with a working connection to the internet.
Open a Terminal window (Applications ---- Accessories ---- Terminal).
Type the following commands:
sudo -i
apt-get update
apt-get install cryptsetup lvm2
fdisk -l
cryptsetup luksOpen /dev/sda? TAG #sda? is your root partition
vgchange -ay
vgscan
vgchange -ay [VOLUME GROUP NAME]
lvscan
/dev/[VOLUME GROUP NAME]/[LOGICAL VOLUME NAME] /mnt
modprobe efivars
mount /dev/sda? /mnt/boot/efi #sda? is your efi partition
mount --bind /dev /mnt/dev
mount --bind /dev/pts /mnt/dev/pts
mount --bind /proc /mnt/proc
mount --bind /sys /mnt/sys
cp /etc/resolv.conf /mnt/etc/
chroot /mnt
apt-get install --reinstall grub-efi-amd64
or
apt-get install --reinstall grub-efi
update-grub
umount /mnt
vgchange -an
cryptsetup luksClose TAG
answered Jan 10 '16 at 15:25
kyodake
9,65011932
add a comment |
Try this:
Boot from an Ubuntu Live USB with a working connection to the internet.
Open a Terminal window (Applications ---- Accessories ---- Terminal).
Type the following commands:
sudo -i
apt-get update
apt-get install cryptsetup lvm2
fdisk -l
cryptsetup luksOpen /dev/sda? TAG #sda? is your root partition
vgchange -ay
vgscan
vgchange -ay [VOLUME GROUP NAME]
lvscan
/dev/[VOLUME GROUP NAME]/[LOGICAL VOLUME NAME] /mnt
modprobe efivars
mount /dev/sda? /mnt/boot/efi #sda? is your efi partition
mount --bind /dev /mnt/dev
mount --bind /dev/pts /mnt/dev/pts
mount --bind /proc /mnt/proc
mount --bind /sys /mnt/sys
cp /etc/resolv.conf /mnt/etc/
chroot /mnt
apt-get install --reinstall grub-efi-amd64
or
apt-get install --reinstall grub-efi
update-grub
umount /mnt
vgchange -an
cryptsetup luksClose TAG
answered Jan 10 '16 at 15:25
kyodake
9,65011932
Try this:
Boot from an Ubuntu Live USB with a working connection to the internet.
Open a Terminal window (Applications ---- Accessories ---- Terminal).
Type the following commands:
sudo -i
apt-get update
apt-get install cryptsetup lvm2
fdisk -l
cryptsetup luksOpen /dev/sda? TAG #sda? is your root partition
vgchange -ay
vgscan
vgchange -ay [VOLUME GROUP NAME]
lvscan
/dev/[VOLUME GROUP NAME]/[LOGICAL VOLUME NAME] /mnt
modprobe efivars
mount /dev/sda? /mnt/boot/efi #sda? is your efi partition
mount --bind /dev /mnt/dev
mount --bind /dev/pts /mnt/dev/pts
mount --bind /proc /mnt/proc
mount --bind /sys /mnt/sys
cp /etc/resolv.conf /mnt/etc/
chroot /mnt
apt-get install --reinstall grub-efi-amd64
or
apt-get install --reinstall grub-efi
update-grub
umount /mnt
vgchange -an
cryptsetup luksClose TAG
answered Jan 10 '16 at 15:25
kyodake
9,65011932
answered Jan 10 '16 at 15:25
kyodake
9,65011932
answered Jan 10 '16 at 15:25
kyodake
9,65011932
answered Jan 10 '16 at 15:25
kyodake
9,65011932
9,65011932
add a comment |
add a comment |
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Given your configuration, you might want to try my rEFInd boot manager, which tends to handle multi-distribution configurations better than GRUB. Try downloading the USB flash drive or CD-R version to see if it will boot both Debian and Ubuntu. (You may need to add extra boot options to identify your root filesystem by pressing F2 or Delete twice to boot Ubuntu.) If it works, you can install the PPA from Ubuntu or the Debian package in either Debian or Ubuntu.
– Rod Smith
Jan 10 '16 at 15:16