Installation guide of Archlinux into Raspberry Pi 2

Raspi2-Arch.md

1. Write to a SD card on the existing linux machine

   # pacman -Syu dosfstools
   # cfdisk /dev/sdb
   # mkfs.vfat /dev/sdb1
   # mkfs.ext4 /dev/sdb2
   # mount /dev/sdb2 /mnt
   # mkdir /mnt/boot
   # mount /dev/sdb1 /mnt/boot
   # wget http://os.archlinuxarm.org/os/ArchLinuxARM-rpi-2-latest.tar.gz  #see https://archlinuxarm.org/about/downloads
   # bsdtar -xpf /home/rsp9u/ArchLinuxARM-rpi-2-latest.tar.gz -C /mnt
   # umount /mnt/boot
   # umount /mnt
   

2. Insert the SD card to Pi, connect an ehternet cable, and turn on Pi.
3. Update keyring

   # pacman-key --refresh-keys
   # pacman -S archlinux-keyring
   # pacman-key --init
   # pacman-key --populate archlinuxarm
   

4. Upgrade all the installed packages

   # pacman -Syu
   

5. Enable Wi-Fi

   # pacman -Syu wpa_supplicant
   # cat << EOS > /etc/wpa_supplicant/wpa_supplicant-wlan0.conf
   ctrl_interface=DIR=/run/wpa_supplicant
   update_config=1
   
   network={
     ssid="SSID"
     psk=...
     ...
   }
   EOS
   # systemctl start wpa_supplicant@wlan0.service
   # systemctl enable wpa_supplicant@wlan0.service
   # cat << EOS > /etc/systemd/network/wlan0.network
   [Match]
   Name=wlan0
   
   [Network]
   DHCP=ipv4
   EOS
   # shutdown -r now
   

6. Add user, Change ssh settings, and so on..