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+# How to do this do with `dd` 
+creation of an virtual disk under linux
+
+1 - do `dd`
+```
+sudo dd if=/dev/zero of=vdisk0.img bs=100M count=100 iflag=fullblock status=progress
+```
+2 - do `cfdisk`
+```
+sudo cfdisk vdisk0.img
+```
+and create the table of partition
+
+3 - after `dd` do : `mkfs`
+```
+sudo mkfs.ext4 -f vdisk0.img
+```
+
+4 - and `mount`
+```
+sudo mount vdisk0.img /mnt
+```
+
+## _Now you can reformat into XFS under an LUKS if you want...._  ;) 
+
+
+# Encrypted virtual disk (LUKS)
+create the folder `vdisks` with `mkdir -p /vdisks`
+1 - do `dd`
+```
+sudo dd if=/dev/random of=/vdisks/secret-data.img bs=100M count=100 iflag=fullblock status=progress
+```
+
+2 - after `dd` do `cfdisk`
+```
+sudo cfdisk /vdisks/secret-data.img
+```
+and create the table of partition
+
+3 - after have do `cfdisk`please do `cryptsetup` to format
+```
+sudo cryptsetup luksFormat /vdisks/secret-data.img
+```
+set your password of this disk(asked)
+
+4 - mount the disk with this
+_an password can be asked_
+```
+sudo cryptsetup luksOpen /vdisks/secret-data.img secret
+sudo mount /dev/mapper/secret /mnt
+```
+
+And if you want unmount
+```
+sudo umount /mnt && sudo cryptsetup luksClose /dev/mapper/secret
+```
+
+...Now you know how to do this