#+TITLE: Arch Linux Installation
* Preparation
- Download Arch Linux ISO image
- Write it to an usb drive with
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  $ dd if=[ARCH-LINUX.iso] of=[/path/to/usbdrive]
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- Boot the computer from this stick

* Prepare the disk
We will partition the disk drive for UEFI boot.
The root disk will be encrypted, /boot will reside inside the unencrypted EFI service partition.
The diskdevice is /dev/sda.

** Partition the disk
- Write some zeros to the disk to make sure there is no bootsector left.
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  $ dd if=/dev/zero of=/dev/sda
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- Abort after a few seconds.
-  Create partitions and format them
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  $ gdisk /dev/sda
    | o [ENTER] to create a new empty GUID partition table (GPT)
    | y [ENTER] to confirm
    |
    | n [ENTER] add a new partition
    | [ENTER] to select default partition number of 1
    | [ENTER] to select default start at first sector
    | +512M [ENTER] make that size partition for booting
    | ef00 [ENTER] EFI partition type
    |
    | n [ENTER] add a new partition
    | [ENTER] to select default partition number of 2
    | [ENTER] to select default start at first sector
    | +60G [ENTER] allocate whatever size wanted for linux
    |
    | w [ENTER] Write changes
    | y [ENTER] confirm
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** Encrypt the root partition
- Create and open the root partition
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  $ cryptsetup luksFormat -v -s 512 -h sha512 /dev/sda2
  $ cryptsetup open /dev/sda2 cryptroot
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- Format with ext4
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  $ mkfs.ext4 /dev/mapper/cryptroot
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- Mount the encrypted volume
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  $ mount /dev/mapper/cryptroot /mnt
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** Mount the /boot partition
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  $ mkfs.fat -F32 /dev/sda1
  $ mkdir /mnt/boot
  $ mount /dev/sda1 /mnt/boot
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* Install the base-system
- Connect to wifi
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  $ wifi-menu
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- Select a nearby (possibly faster) mirror by editing /etc/pacman.d/mirrorlist
- Install the base-system
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  $ pacstrap /mnt base base-devel dialog openssl-1.0 git intel-ucode \
    wpa_supplicant ansible linux linux-firmware vi netctl
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- Generate fstab for the new system
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  $ genfstab -pU /mnt >> /mnt/etc/fstab
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* Configure the new system
- Chroot into the new system
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  $ arch-chroot /mnt /bin/bash
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- Set the hostname
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  $ echo MYHOSTNAME > /etc/hostname
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- Edit /etc/vconsole.conf to set keyboard and font
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  $ vi /etc/vconsole.conf
    FONT=latarcyrheb-sun32
    KEYMAP=de
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The FONT setting is optional. latarcyrheb-sun32 is useful for small hidpi devices like GPD Pocket.
- Add encryption components to initramfs
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  $ vi /etc/mkinitcpio.conf
    ...
    HOOKS=(base udev autodetect keyboard keymap consolefont modconf block encrypt
           filesystems fsck)
    ...
  $ mkinitcpio -P
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- Install bootloader
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  $ bootctl install
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- Configure the bootloader
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  $ vi /boot/loader/loader.conf
    default arch
    auto-firmware no
    timeout 0
    console-mode 2
    editor no
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- Configure the bootloader entry
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  $ blkid | grep sda2 | cut -d \" -f 2 > /boot/loader/entries/arch.conf
  $ vi /boot/loader/arch.conf
    title Arch Linux
    linux /vmlinuz-linux
    initrd /intel-ucode.img
    initrd /initramfs-linux.img
    options cryptdevice=UUID=[DEVICE-UUID]:cryptroot root=/dev/mapper/cryptroot rw
   fbcon=rotate:1
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DEVICE-UUID is the string we added with the first command.
fbcon=rotate:1 rotates the display. This is ONLY NEEDED on device like GPD Pocket.

* More configuration
- Perform basic systemconfiguration
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  $ git clone https://github.com/elfrinjo/dotfiles
  $ cd dotfiles
  $ ./Setup.sh
  $ cd sysconfig_arch
  $ sudo ansible-playbook baseconfig.yaml
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- Setup.sh can take options to replace some configfiles. Options are:
| Option | Description                            |
|--------+----------------------------------------|
| gpdp2  | Some differences for the GPD Pocket II |
|        |                                        |
- Change the root password
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  $ passwd
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- Create useraccount
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  $ useradd -m -G sudo [USERNAME]
  $ passwd [USERNAME]
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- Exit the chroot
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  $ exit
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- Shutdown the system
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  $ shutdown -h now
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- Remove usb-drive
- Start the computer
- Enter drive encryption password
- Logon as the newly created user
- Connect to wifi
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  $ sudo wifi-menu
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- Perform more system configuration
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  $ git clone https://github.com/elfrinjo/dotfiles
  $ cd dotfiles
  $ ./Setup.sh
  $ cd sysconfig_arch
  $ sudo ansible-playbook workstation.yaml
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- If there are special configfiles for Setup.sh, repeat with appropriate options. (See above)
- At some point the Desktop will start. When this happens, just log on and continue inside a terminal
- Update the system
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  $ pacman -Syu
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- Reboot
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  $ reboot
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