2020-06-23 09:42:29 +02:00
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## encrypt swap partition
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sources :
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* [wiki.archlinux.org - dm-crypt/Swap encryption](https://wiki.archlinux.org/index.php/Dm-crypt/Swap_encryption#LVM_on_LUKS)
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* [help.ubuntu.com - Enable Hibernate With Encrypted Swap](https://help.ubuntu.com/community/EnableHibernateWithEncryptedSwap)
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~~~
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apt-get install ecryptfs-utils
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swapoff -a
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cryptsetup luksFormat --cipher aes-xts-plain64 --verify-passphrase --key-size 256 /dev/nvme0n1p2
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cryptsetup open /dev/<device> cryptswap
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mkswap /dev/mapper/cryptswap
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Configure l'espace d'échange (swap) en version 1, taille = 31,1 GiB (33420210176 octets)
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pas d'étiquette, UUID=4fd1ffc-6d5b-450a-9737-abf1ffb80b1
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~~~
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edit : /etc/default/grub
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~~~
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GRUB_CMDLINE_LINUX_DEFAULT="quiet splash resume=UUID=4fd1ffc-6d5b-450a-9737-abf1ffb80b1"
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~~~
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~~~
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update-grub
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~~~
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Now ajust /etc/fstab to use your mapper, replace your encrypt swap device like bellow :
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~~~
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/dev/mapper/cryptswap none swap discard 0 0
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~~~
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add your encrypt swap device define in /etc/crypttab
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~~~
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cryptswap /dev/nvme0n1p2 none luks
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~~~
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~~~
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swapon -a
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~~~
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/!\ ici faut trouver comment on recupere le blkid de la partition swap
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~~~
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printf "RESUME=UUID=/dev/mapper/cryptswap" | tee /etc/initramfs-tools/conf.d/resume
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~~~
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Register these changes.
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~~~
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update-initramfs -u -k all
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~~~
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### to be solve
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~~~
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cryptsetup: ERROR: Couln't resolve device rpool/ROOT/ubuntu_...
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cryptsetup: WARNING: Couln't determine root device
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~~~
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## disable encrypt swap partition
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* Turn off swap
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~~~
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swapoff /dev/mapper/cryptswap1
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~~~
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* remove your encrypt swap device define in your /etc/crypttab
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* ajust /etc/fstab to use your real swap partition
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~~~
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/dev/nvme0n1p2 none swap discard 0 0
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~~~
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* Change your /etc/default/grub GRUB_CMDLINE_LINUX_DEFAULT to
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~~~
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GRUB_CMDLINE_LINUX_DEFAULT="quiet splash resume=/dev/nvme0n1p2"
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~~~
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~~~
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update-grub
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~~~
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* edit /etc/initramfs-tools/conf.d/resume. Replace the existing RESUME line with the following line.
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~~~
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RESUME=/dev/nvme0n1p2
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~~~
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Register these changes.
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~~~
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update-initramfs -u -k all
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~~~
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* make your partition a swap
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~~~
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mkswap /dev/nvme0n1p2
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~~~
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* activate swap
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~~~
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swapon -a
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~~~
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