How to change the name an encrypted full-system partition is mapped to
13
My system is fully encrypted with dm-crypt and LVM. I recently moved the encrypted partition from /dev/sda5 to /dev/sda2.
My question is: how can I change the name the encrypted partition is mapped to from sda5_crypt to sda2_crypt?
I can boot the system all right. But the prompt I get at boot time says (sda5_crypt) though the UUID maps to /dev/sda2:
Volume group "vg" not found
Skipping volume group vg
Unlocking the disk /dev/.../UUID (sda5_crypt)
Enter passphrase:
I tried to live-boot, decrypt sda2, activate vg, chroot to /dev/vg/root and run update-grub2 but to no avail.
Merely editing /etc/crypttab doesn't work either.
dm-crypt
asked Jun 28 '13 at 12:34
n.r.n.r.
946824
|
show 1 more comment
13
My system is fully encrypted with dm-crypt and LVM. I recently moved the encrypted partition from /dev/sda5 to /dev/sda2.
My question is: how can I change the name the encrypted partition is mapped to from sda5_crypt to sda2_crypt?
I can boot the system all right. But the prompt I get at boot time says (sda5_crypt) though the UUID maps to /dev/sda2:
Volume group "vg" not found
Skipping volume group vg
Unlocking the disk /dev/.../UUID (sda5_crypt)
Enter passphrase:
I tried to live-boot, decrypt sda2, activate vg, chroot to /dev/vg/root and run update-grub2 but to no avail.
Merely editing /etc/crypttab doesn't work either.
dm-crypt
asked Jun 28 '13 at 12:34
n.r.n.r.
946824
Have you recreated the initrd after editing/etc/crypttab?
– Hauke Laging
Jun 28 '13 at 12:53
I think so:update-initramfs -t -u -k all
– n.r.
Jun 28 '13 at 12:59
Output ofgrep -r sda5_crypt /etc?
– Hauke Laging
Jun 28 '13 at 13:04
Found the issue: I must mount/dev/sda1as/bootbefore runningupdate-initramfs.
– n.r.
Jun 28 '13 at 13:36
Make that an answer instead of a comment and accept it (if that is possible with own answers, I am not sure) so that this question is shown as answered.
– Hauke Laging
Jun 28 '13 at 13:48
|
show 1 more comment
13
13
13
3
My system is fully encrypted with dm-crypt and LVM. I recently moved the encrypted partition from /dev/sda5 to /dev/sda2.
My question is: how can I change the name the encrypted partition is mapped to from sda5_crypt to sda2_crypt?
I can boot the system all right. But the prompt I get at boot time says (sda5_crypt) though the UUID maps to /dev/sda2:
Volume group "vg" not found
Skipping volume group vg
Unlocking the disk /dev/.../UUID (sda5_crypt)
Enter passphrase:
I tried to live-boot, decrypt sda2, activate vg, chroot to /dev/vg/root and run update-grub2 but to no avail.
Merely editing /etc/crypttab doesn't work either.
dm-crypt
asked Jun 28 '13 at 12:34
n.r.n.r.
946824
My system is fully encrypted with dm-crypt and LVM. I recently moved the encrypted partition from /dev/sda5 to /dev/sda2.
My question is: how can I change the name the encrypted partition is mapped to from sda5_crypt to sda2_crypt?
I can boot the system all right. But the prompt I get at boot time says (sda5_crypt) though the UUID maps to /dev/sda2:
Volume group "vg" not found
Skipping volume group vg
Unlocking the disk /dev/.../UUID (sda5_crypt)
Enter passphrase:
I tried to live-boot, decrypt sda2, activate vg, chroot to /dev/vg/root and run update-grub2 but to no avail.
Merely editing /etc/crypttab doesn't work either.
dm-crypt
dm-crypt
asked Jun 28 '13 at 12:34
n.r.n.r.
946824
asked Jun 28 '13 at 12:34
n.r.n.r.
946824
asked Jun 28 '13 at 12:34
n.r.n.r.
946824
asked Jun 28 '13 at 12:34
n.r.n.r.
946824
asked Jun 28 '13 at 12:34
n.r.n.r.
946824
946824
Have you recreated the initrd after editing/etc/crypttab?
– Hauke Laging
Jun 28 '13 at 12:53
I think so:update-initramfs -t -u -k all
– n.r.
Jun 28 '13 at 12:59
Output ofgrep -r sda5_crypt /etc?
– Hauke Laging
Jun 28 '13 at 13:04
Found the issue: I must mount/dev/sda1as/bootbefore runningupdate-initramfs.
– n.r.
Jun 28 '13 at 13:36
Make that an answer instead of a comment and accept it (if that is possible with own answers, I am not sure) so that this question is shown as answered.
– Hauke Laging
Jun 28 '13 at 13:48
|
show 1 more comment
Have you recreated the initrd after editing/etc/crypttab?
– Hauke Laging
Jun 28 '13 at 12:53
I think so:update-initramfs -t -u -k all
– n.r.
Jun 28 '13 at 12:59
Output ofgrep -r sda5_crypt /etc?
– Hauke Laging
Jun 28 '13 at 13:04
Found the issue: I must mount/dev/sda1as/bootbefore runningupdate-initramfs.
– n.r.
Jun 28 '13 at 13:36
Make that an answer instead of a comment and accept it (if that is possible with own answers, I am not sure) so that this question is shown as answered.
– Hauke Laging
Jun 28 '13 at 13:48
Have you recreated the initrd after editing
/etc/crypttab?– Hauke Laging
Jun 28 '13 at 12:53
Have you recreated the initrd after editing
/etc/crypttab?– Hauke Laging
Jun 28 '13 at 12:53
I think so:
update-initramfs -t -u -k all– n.r.
Jun 28 '13 at 12:59
I think so:
update-initramfs -t -u -k all– n.r.
Jun 28 '13 at 12:59
Output of
grep -r sda5_crypt /etc?– Hauke Laging
Jun 28 '13 at 13:04
Output of
grep -r sda5_crypt /etc?– Hauke Laging
Jun 28 '13 at 13:04
Found the issue: I must mount
/dev/sda1 as /boot before running update-initramfs.– n.r.
Jun 28 '13 at 13:36
Found the issue: I must mount
/dev/sda1 as /boot before running update-initramfs.– n.r.
Jun 28 '13 at 13:36
Make that an answer instead of a comment and accept it (if that is possible with own answers, I am not sure) so that this question is shown as answered.
– Hauke Laging
Jun 28 '13 at 13:48
Make that an answer instead of a comment and accept it (if that is possible with own answers, I am not sure) so that this question is shown as answered.
– Hauke Laging
Jun 28 '13 at 13:48
|
show 1 more comment
2 Answers
2
active
oldest
votes
17
"sda5_crypt" crypttab change as per suggestion below:
Replace OLD_NAME with NEW_NAME in /etc/crypttab, and then:
# dmsetup rename OLD_NAME NEW_NAME
# update-initramfs -c -t -k all
# update-grub
# reboot
answered Jun 28 '13 at 14:07
n.r.n.r.
946824
2
rescue should not be necessary. just edit the crypttab, update-initramfs, and next time you boot it should be renamed. You can also rename it in the running system usingdmsetup rename oldname newname. Note that this does not free the old name, as it may be in use.
– frostschutz
Jun 28 '13 at 18:29
@frostschutz You have to be able to get at that/etc/crypttabfile somehow… Doing the mounting manually from the initramfs shell so that you can boot the normal system is possible, but not easy. A rescue system is the quicker option if you aren't intimately familiar withcryptsetupand LVM commands.
– Gilles
Jun 28 '13 at 22:45
1
@Gilles: sure, but the question stated "I can boot the system all right."
– frostschutz
Jun 29 '13 at 11:29
You just saved me a big headache @n.r. Thank you
– deitch
May 6 '16 at 10:38
add a comment |
0
I just came across this issue - with the additional complication that I haven't seen the warning of the last update-initramfs. So I renamed the device in crypttab, ran update-initramfs, restarted and had a problem. I solved it as follows, basically the same n.r. but I had to alter the commands slightly:
- Boot a Live (K)Ubuntu System from USB
- Open the device in Dolphin/? which setups all the needed configuration and asks you your password
- Open the console in the root directory of your broken system
- Execute the following line by line
sudo -s
# get the name the partition was mounted with, starts with luks
dmsetup ls
# rename the loop device (check with ls /dev/mapper)
dmsetup rename LUKS_NAME NEW_NAME
# prepare chroot
mount --bind /dev dev/
mount --bind /proc proc/
mount --bind /sys sys/
chroot .
# mount devices (I missed this first, you need both)
mount boot
mount /
# ready to update
update-initramfs -u -k all
answered 7 mins ago
y_zy_z
1
New contributor
y_z is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
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2 Answers
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2 Answers
2
active
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active
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oldest
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17
"sda5_crypt" crypttab change as per suggestion below:
Replace OLD_NAME with NEW_NAME in /etc/crypttab, and then:
# dmsetup rename OLD_NAME NEW_NAME
# update-initramfs -c -t -k all
# update-grub
# reboot
answered Jun 28 '13 at 14:07
n.r.n.r.
946824
2
rescue should not be necessary. just edit the crypttab, update-initramfs, and next time you boot it should be renamed. You can also rename it in the running system usingdmsetup rename oldname newname. Note that this does not free the old name, as it may be in use.
– frostschutz
Jun 28 '13 at 18:29
@frostschutz You have to be able to get at that/etc/crypttabfile somehow… Doing the mounting manually from the initramfs shell so that you can boot the normal system is possible, but not easy. A rescue system is the quicker option if you aren't intimately familiar withcryptsetupand LVM commands.
– Gilles
Jun 28 '13 at 22:45
1
@Gilles: sure, but the question stated "I can boot the system all right."
– frostschutz
Jun 29 '13 at 11:29
You just saved me a big headache @n.r. Thank you
– deitch
May 6 '16 at 10:38
add a comment |
17
"sda5_crypt" crypttab change as per suggestion below:
Replace OLD_NAME with NEW_NAME in /etc/crypttab, and then:
# dmsetup rename OLD_NAME NEW_NAME
# update-initramfs -c -t -k all
# update-grub
# reboot
answered Jun 28 '13 at 14:07
n.r.n.r.
946824
2
rescue should not be necessary. just edit the crypttab, update-initramfs, and next time you boot it should be renamed. You can also rename it in the running system usingdmsetup rename oldname newname. Note that this does not free the old name, as it may be in use.
– frostschutz
Jun 28 '13 at 18:29
@frostschutz You have to be able to get at that/etc/crypttabfile somehow… Doing the mounting manually from the initramfs shell so that you can boot the normal system is possible, but not easy. A rescue system is the quicker option if you aren't intimately familiar withcryptsetupand LVM commands.
– Gilles
Jun 28 '13 at 22:45
1
@Gilles: sure, but the question stated "I can boot the system all right."
– frostschutz
Jun 29 '13 at 11:29
You just saved me a big headache @n.r. Thank you
– deitch
May 6 '16 at 10:38
add a comment |
17
17
17
"sda5_crypt" crypttab change as per suggestion below:
Replace OLD_NAME with NEW_NAME in /etc/crypttab, and then:
# dmsetup rename OLD_NAME NEW_NAME
# update-initramfs -c -t -k all
# update-grub
# reboot
answered Jun 28 '13 at 14:07
n.r.n.r.
946824
"sda5_crypt" crypttab change as per suggestion below:
Replace OLD_NAME with NEW_NAME in /etc/crypttab, and then:
# dmsetup rename OLD_NAME NEW_NAME
# update-initramfs -c -t -k all
# update-grub
# reboot
answered Jun 28 '13 at 14:07
n.r.n.r.
946824
edited Dec 26 '13 at 3:33
answered Jun 28 '13 at 14:07
n.r.n.r.
946824
answered Jun 28 '13 at 14:07
n.r.n.r.
946824
answered Jun 28 '13 at 14:07
n.r.n.r.
946824
946824
2
rescue should not be necessary. just edit the crypttab, update-initramfs, and next time you boot it should be renamed. You can also rename it in the running system usingdmsetup rename oldname newname. Note that this does not free the old name, as it may be in use.
– frostschutz
Jun 28 '13 at 18:29
@frostschutz You have to be able to get at that/etc/crypttabfile somehow… Doing the mounting manually from the initramfs shell so that you can boot the normal system is possible, but not easy. A rescue system is the quicker option if you aren't intimately familiar withcryptsetupand LVM commands.
– Gilles
Jun 28 '13 at 22:45
1
@Gilles: sure, but the question stated "I can boot the system all right."
– frostschutz
Jun 29 '13 at 11:29
You just saved me a big headache @n.r. Thank you
– deitch
May 6 '16 at 10:38
add a comment |
2
rescue should not be necessary. just edit the crypttab, update-initramfs, and next time you boot it should be renamed. You can also rename it in the running system usingdmsetup rename oldname newname. Note that this does not free the old name, as it may be in use.
– frostschutz
Jun 28 '13 at 18:29
@frostschutz You have to be able to get at that/etc/crypttabfile somehow… Doing the mounting manually from the initramfs shell so that you can boot the normal system is possible, but not easy. A rescue system is the quicker option if you aren't intimately familiar withcryptsetupand LVM commands.
– Gilles
Jun 28 '13 at 22:45
1
@Gilles: sure, but the question stated "I can boot the system all right."
– frostschutz
Jun 29 '13 at 11:29
You just saved me a big headache @n.r. Thank you
– deitch
May 6 '16 at 10:38
2
2
rescue should not be necessary. just edit the crypttab, update-initramfs, and next time you boot it should be renamed. You can also rename it in the running system using
dmsetup rename oldname newname. Note that this does not free the old name, as it may be in use.– frostschutz
Jun 28 '13 at 18:29
rescue should not be necessary. just edit the crypttab, update-initramfs, and next time you boot it should be renamed. You can also rename it in the running system using
dmsetup rename oldname newname. Note that this does not free the old name, as it may be in use.– frostschutz
Jun 28 '13 at 18:29
@frostschutz You have to be able to get at that
/etc/crypttab file somehow… Doing the mounting manually from the initramfs shell so that you can boot the normal system is possible, but not easy. A rescue system is the quicker option if you aren't intimately familiar with cryptsetup and LVM commands.– Gilles
Jun 28 '13 at 22:45
@frostschutz You have to be able to get at that
/etc/crypttab file somehow… Doing the mounting manually from the initramfs shell so that you can boot the normal system is possible, but not easy. A rescue system is the quicker option if you aren't intimately familiar with cryptsetup and LVM commands.– Gilles
Jun 28 '13 at 22:45
1
1
@Gilles: sure, but the question stated "I can boot the system all right."
– frostschutz
Jun 29 '13 at 11:29
@Gilles: sure, but the question stated "I can boot the system all right."
– frostschutz
Jun 29 '13 at 11:29
You just saved me a big headache @n.r. Thank you
– deitch
May 6 '16 at 10:38
You just saved me a big headache @n.r. Thank you
– deitch
May 6 '16 at 10:38
add a comment |
0
I just came across this issue - with the additional complication that I haven't seen the warning of the last update-initramfs. So I renamed the device in crypttab, ran update-initramfs, restarted and had a problem. I solved it as follows, basically the same n.r. but I had to alter the commands slightly:
- Boot a Live (K)Ubuntu System from USB
- Open the device in Dolphin/? which setups all the needed configuration and asks you your password
- Open the console in the root directory of your broken system
- Execute the following line by line
sudo -s
# get the name the partition was mounted with, starts with luks
dmsetup ls
# rename the loop device (check with ls /dev/mapper)
dmsetup rename LUKS_NAME NEW_NAME
# prepare chroot
mount --bind /dev dev/
mount --bind /proc proc/
mount --bind /sys sys/
chroot .
# mount devices (I missed this first, you need both)
mount boot
mount /
# ready to update
update-initramfs -u -k all
answered 7 mins ago
y_zy_z
1
New contributor
y_z is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
0
I just came across this issue - with the additional complication that I haven't seen the warning of the last update-initramfs. So I renamed the device in crypttab, ran update-initramfs, restarted and had a problem. I solved it as follows, basically the same n.r. but I had to alter the commands slightly:
- Boot a Live (K)Ubuntu System from USB
- Open the device in Dolphin/? which setups all the needed configuration and asks you your password
- Open the console in the root directory of your broken system
- Execute the following line by line
sudo -s
# get the name the partition was mounted with, starts with luks
dmsetup ls
# rename the loop device (check with ls /dev/mapper)
dmsetup rename LUKS_NAME NEW_NAME
# prepare chroot
mount --bind /dev dev/
mount --bind /proc proc/
mount --bind /sys sys/
chroot .
# mount devices (I missed this first, you need both)
mount boot
mount /
# ready to update
update-initramfs -u -k all
answered 7 mins ago
y_zy_z
1
New contributor
y_z is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
0
0
0
I just came across this issue - with the additional complication that I haven't seen the warning of the last update-initramfs. So I renamed the device in crypttab, ran update-initramfs, restarted and had a problem. I solved it as follows, basically the same n.r. but I had to alter the commands slightly:
- Boot a Live (K)Ubuntu System from USB
- Open the device in Dolphin/? which setups all the needed configuration and asks you your password
- Open the console in the root directory of your broken system
- Execute the following line by line
sudo -s
# get the name the partition was mounted with, starts with luks
dmsetup ls
# rename the loop device (check with ls /dev/mapper)
dmsetup rename LUKS_NAME NEW_NAME
# prepare chroot
mount --bind /dev dev/
mount --bind /proc proc/
mount --bind /sys sys/
chroot .
# mount devices (I missed this first, you need both)
mount boot
mount /
# ready to update
update-initramfs -u -k all
answered 7 mins ago
y_zy_z
1
New contributor
y_z is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I just came across this issue - with the additional complication that I haven't seen the warning of the last update-initramfs. So I renamed the device in crypttab, ran update-initramfs, restarted and had a problem. I solved it as follows, basically the same n.r. but I had to alter the commands slightly:
- Boot a Live (K)Ubuntu System from USB
- Open the device in Dolphin/? which setups all the needed configuration and asks you your password
- Open the console in the root directory of your broken system
- Execute the following line by line
sudo -s
# get the name the partition was mounted with, starts with luks
dmsetup ls
# rename the loop device (check with ls /dev/mapper)
dmsetup rename LUKS_NAME NEW_NAME
# prepare chroot
mount --bind /dev dev/
mount --bind /proc proc/
mount --bind /sys sys/
chroot .
# mount devices (I missed this first, you need both)
mount boot
mount /
# ready to update
update-initramfs -u -k all
answered 7 mins ago
y_zy_z
1
New contributor
y_z is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 7 mins ago
y_zy_z
1
New contributor
y_z is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 7 mins ago
y_zy_z
1
answered 7 mins ago
y_zy_z
1
1
New contributor
y_z is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
y_z is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
y_z is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
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Have you recreated the initrd after editing
/etc/crypttab?– Hauke Laging
Jun 28 '13 at 12:53
I think so:
update-initramfs -t -u -k all– n.r.
Jun 28 '13 at 12:59
Output of
grep -r sda5_crypt /etc?– Hauke Laging
Jun 28 '13 at 13:04
Found the issue: I must mount
/dev/sda1as/bootbefore runningupdate-initramfs.– n.r.
Jun 28 '13 at 13:36
Make that an answer instead of a comment and accept it (if that is possible with own answers, I am not sure) so that this question is shown as answered.
– Hauke Laging
Jun 28 '13 at 13:48