1.8 KiB
1.8 KiB
encrypt swap Ubuntu 20.04 with hibernation
prerequisite
- all command bellow are run has root
- install ecryptfs
root@laptop:/root# install apt-get install ecryptfs-utils
encrypt swap
- turn off current swap
root@laptop:/root# swapoff -a
- encrypt swap partition
root@laptop:/root# cryptsetup luksFormat --cipher aes-xts-plain64 --verify-passphrase --key-size 256 /dev/nvme0n1p2
root@laptop:/root# cryptsetup open /dev/nvme0n1p2 cryptswap
- set up the crypt partition as swap.
root@laptop:/root# mkswap /dev/mapper/cryptswap
- ajust /etc/fstab to use your mapper, replace your encrypt swap device like bellow :
/dev/mapper/cryptswap none swap discard 0 0
- add your encrypt swap device define in /etc/crypttab
cryptswap /dev/nvme0n1p2 none luks
- enable swap
root@laptop:/root# swapon -a
- edit /etc/initramfs-tools/conf.d/resume. Replace the existing RESUME line with the following line.
root@laptop:/root# printf "RESUME=/dev/mapper/cryptswap" | tee /etc/initramfs-tools/conf.d/resume
- Register these changes.
root@laptop:/root# update-initramfs -u -k all
- Change your /etc/default/grub GRUB_CMDLINE_LINUX_DEFAULT to point to remove or be sure there is nothing in resume
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
root@laptop:/root# update-grub
to be solve
cryptsetup: ERROR: Couln't resolve device rpool/ROOT/ubuntu_...
cryptsetup: WARNING: Couln't determine root device