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un peut de mise en page / ajout descriptifs

Michel Le Cocq 2020-06-24 08:25:41 +02:00
parent c6ab075879
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encrypt-swap-Ubuntu-20.04.md

@ -1,42 +1,60 @@
# encrypt swap Ubuntu 20.04 with hibernation
## prerequisite ## prerequisite
* all command bellow are run has root * all command bellow are run has root
* install ecryptfs
## encrypt swap partition
~~~
sources : install apt-get install ecryptfs-utils
* [wiki.archlinux.org - dm-crypt/Swap encryption](https://wiki.archlinux.org/index.php/Dm-crypt/Swap_encryption#LVM_on_LUKS) ~~~
* [help.ubuntu.com - Enable Hibernate With Encrypted Swap](https://help.ubuntu.com/community/EnableHibernateWithEncryptedSwap)
## encrypt swap
* turn off current swap
~~~ ~~~
apt-get install ecryptfs-utils
swapoff -a swapoff -a
~~~
* encrypt swap partition
~~~
cryptsetup luksFormat --cipher aes-xts-plain64 --verify-passphrase --key-size 256 /dev/nvme0n1p2 cryptsetup luksFormat --cipher aes-xts-plain64 --verify-passphrase --key-size 256 /dev/nvme0n1p2
cryptsetup open /dev/nvme0n1p2 cryptswap cryptsetup open /dev/nvme0n1p2 cryptswap
~~~
* set up the crypt partition as swap.
~~~
mkswap /dev/mapper/cryptswap mkswap /dev/mapper/cryptswap
~~~ ~~~
Now ajust /etc/fstab to use your mapper, replace your encrypt swap device like bellow : * ajust /etc/fstab to use your mapper, replace your encrypt swap device like bellow :
~~~ ~~~
/dev/mapper/cryptswap none swap discard 0 0 /dev/mapper/cryptswap none swap discard 0 0
~~~ ~~~
add your encrypt swap device define in /etc/crypttab * add your encrypt swap device define in /etc/crypttab
~~~ ~~~
cryptswap /dev/nvme0n1p2 none luks cryptswap /dev/nvme0n1p2 none luks
~~~ ~~~
* enable swap
~~~ ~~~
swapon -a swapon -a
~~~ ~~~
* edit /etc/initramfs-tools/conf.d/resume. Replace the existing RESUME line with the following line.
~~~ ~~~
printf "RESUME=UUID=/dev/mapper/cryptswap" | tee /etc/initramfs-tools/conf.d/resume printf "RESUME=UUID=/dev/mapper/cryptswap" | tee /etc/initramfs-tools/conf.d/resume
~~~ ~~~
Register these changes. * Register these changes.
~~~ ~~~
update-initramfs -u -k all update-initramfs -u -k all
@ -48,3 +66,7 @@ update-initramfs -u -k all
cryptsetup: ERROR: Couln't resolve device rpool/ROOT/ubuntu_... cryptsetup: ERROR: Couln't resolve device rpool/ROOT/ubuntu_...
cryptsetup: WARNING: Couln't determine root device cryptsetup: WARNING: Couln't determine root device
~~~ ~~~
## sources
* [wiki.archlinux.org - dm-crypt/Swap encryption](https://wiki.archlinux.org/index.php/Dm-crypt/Swap_encryption#LVM_on_LUKS)
* [help.ubuntu.com - Enable Hibernate With Encrypted Swap](https://help.ubuntu.com/community/EnableHibernateWithEncryptedSwap)