diff --git a/encrypt-swap-Ubuntu-20.04.md b/encrypt-swap-Ubuntu-20.04.md
index 79debd7..d97aae2 100644
--- a/encrypt-swap-Ubuntu-20.04.md
+++ b/encrypt-swap-Ubuntu-20.04.md
@@ -1,42 +1,60 @@
+# encrypt swap Ubuntu 20.04 with hibernation
+
 ## prerequisite
 
 * all command bellow are run has root
-
-## encrypt swap partition
-
-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)
+* install ecryptfs
+
+~~~
+install apt-get install ecryptfs-utils
+~~~
+
+## encrypt swap
+
+* turn off current swap
 
 ~~~
-apt-get install ecryptfs-utils
 swapoff -a
+~~~
+
+* encrypt swap partition
+
+~~~
 cryptsetup luksFormat --cipher aes-xts-plain64 --verify-passphrase --key-size 256 /dev/nvme0n1p2
 cryptsetup open /dev/nvme0n1p2 cryptswap
+~~~
+
+* set up the crypt partition as swap.
+
+~~~
 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
 ~~~
 
-add your encrypt swap device define in /etc/crypttab
+* add your encrypt swap device define in /etc/crypttab
 
 ~~~
 cryptswap   /dev/nvme0n1p2		none	luks
 ~~~
 
+* enable swap
+
 ~~~
 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
 ~~~
 
-Register these changes.
+* Register these changes.
 
 ~~~
 update-initramfs -u -k all
@@ -48,3 +66,7 @@ update-initramfs -u -k all
 cryptsetup: ERROR: Couln't resolve device rpool/ROOT/ubuntu_...
 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)