# Kaiten-yaki : Yet another full disk encryption for GRUB/Linux
Kaiten-yaki is a script set to help you to make a full disk encryption install to your desktop system.

Followings are the list of functionality. 
- Support Ubuntu and Void Linux.
- Install from LiveCD/USB.
- Invoke GUI/TUI installer at the middle of script execution, for the ease of installation.
- Automatic detection of BIOS/EFI firmware and create MBR/GPT, respectively.
- Support to install multiple distributions in a LUKS partition.
- The "/boot" is located in the same logical volume with the "/". 
- The swap logical volume is located inside encrypted volume. 
- You need to type a passphrase only once in the boot sequence. 

With the configuration parameters, you can customize each installation.  For example, you can configure the system to have 2, 3 or 4,... distributions in a HDD/SSD, as you want. 

Following is the HDD/SSD partitioning plan of these scripts ( In case of BIOS, the disk has MBR and doesn't have EFI partition, while it is depicted here). 

![Partition Diagram](image/partition_diagram_0.png)

The logical volume size of each Linux distribution (LVROOTSIZE) can be customized from a configuration parameter. Also, the swap volume size is customizable. 

As depicted above, the LVM volume group has only one physical volume. 

# Tested environment
These scripts are tested with following environment. 
- VMWare Workstation 15.5.7 ( EFI/BIOS )
- Ubuntu 20.04.2 amd64 desktop
- Ubuntu Mate 20.04.2 amd64 desktop
- void-live-x86_64-20210218-mate.iso
- void-live-x86_64-musl-20210218-mate.iso

# Installation
Start the PC with the LiveCD/LiveUSB of the distribution to install. Download this repository from github, and expand it. 

Then, go to script directory and follow the procedure in the [INSTALL.md](INSTALL.md)

# Known issues
If you install two or more Void Linux in to the EFI system, only the last one can boot without trouble. This is not the problem of Kaiten-yaki. 

# Variants considerations
Ubuntu has several variants ( flavors ). While I have tested only MATE flavor, other flavor may work correctly as far as it uses Ubiquity installer.

Void Linux has "base" variant which doesn't have GUI. Kaiten-yaki can't run correctly without GUI. 

# Acknowledgments
These scripts are based on the script shared on the [myn's diary](https://myn.hatenablog.jp/entry/install-ubuntu-focal-with-lvm-on-luks). That page contains rich information, hint and techniques around the encrypted volume and Ubiquity installer. 

Also, following documents were very important to study how Void Linux installation works. 
- [Full Disk Encryption](https://docs.voidlinux.org/installation/guides/fde.html) in the Void Handbook. 
- [Install LVM LUKS](https://wiki.voidlinux.org/Install_LVM_LUKS) (deprecated)
# Kaiten-yaki
![](image/i-like-kaiten-yaki.jpg)