wiki-system/encrypt-swap-Ubuntu-20.04.md
2020-06-23 06:40:59 +02:00

1.9 KiB

encrypt swap partition

sources :

apt-get install ecryptfs-utils
swapoff -a
cryptsetup luksFormat --cipher aes-xts-plain64 --verify-passphrase --key-size 256 /dev/nvme0n1p2
cryptsetup open /dev/<device> swapDevice
mkswap /dev/mapper/mkswap /dev/mapper/swapDevice

edit : /etc/default/grub

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash resume=/dev/mapper/swapDevice"
update-grub

Now ajust /etc/fstab to use your mapper, replace your encrypt swap device like bellow :

/dev/nvme0n1p2   none   swap   discard   0   0

remove your encrypt swap device define in /etc/crypttab

swapDevice   /dev/nvme0n1p2		none	luks
swapon -a

Register these changes.

update-initramfs -u -k all

disable encrypt swap partition

  • Turn off swap
swapoff /dev/mapper/cryptswap1
  • remove your encrypt swap device define in your /etc/crypttab

  • ajust /etc/fstab to use your real swap partition

/dev/nvme0n1p2   none   swap   discard   0   0
  • Change your /etc/default/grub GRUB_CMDLINE_LINUX_DEFAULT to
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash resume=/dev/nvme0n1p2"
update-grub
  • edit /etc/initramfs-tools/conf.d/resume. Replace the existing RESUME line with the following line.
RESUME=/dev/nvme0n1p2

Register these changes.

update-initramfs -u -k all
  • make your partition a swap
mkswap /dev/nvme0n1p2
  • activate swap
swapon -a

to be solve

cryptsetup: ERROR: Couln't resolve device rpool/ROOT/ubuntu_...
cryptsetup: WARNING: Couln't determine root device