This is a list of the commands I’d run to set up a machine with Arch Linux as of today (25th April 2020).

First of all, create a bootable USB (or CD) based on the ISO downloaded from the main Arch Linux website and boot it up.

Initial steps

Set keyboard layout to UK

loadkeys uk

Connect to the Internet (Ethernet is easier, but Wireless is just as easy) before continuing…

Set timezone and enable NTP

Set the time zone to London and enable NTP for keeping the time/date synchronised.

timedatectl set-timezone Europe/London
timedatectl set-ntp true

Disk setup

Create your disk partition layouts at this point using the preferred disk partition tool (fdisk, cfdisk, parted etc.) but remember that if you’re enabling encryption, create the partitions accordingly.

Remember that I always recommend /home being on a separate partition!

Formatting a partition (assuming ext4 which is most common)

mkfs.ext4 /dev/sda1

or without journaling enabled

mkfs.ext4 -O "^has_journal" /dev/sda1

or with BTRFS instead

mkfs.btrfs /dev/sda1

Formatting the swap partition

mkswap /dev/sda2

Get ready to install (mount drives)

mount /dev/sda3 /mnt
mkdir /mnt/home
mount /dev/sda4 /home

and if you created a separate /boot partition

mkdir /mnt/boot
mount /dev/sda1 /boot

and finally enable the swap partition

swapon /dev/sda2

Install the basics

pacstrap /mnt base base-devel linux linux-firmware

Create the fstab file

genfstab -U /mnt >> /mnt/etc/fstab

Chroot into the installed OS

arch-chroot /mnt

Next steps…

Set the root password - make it secure!

passwd

Set the locale

Edit /etc/locale.gen to uncomment any en_GB entries before generating the locale file

locale-gen
echo LANG=en_GB.UTF-8 > /etc/locale.conf
echo KEYMAP=uk > /etc/vconsole.conf

Set the hardware clock

ln -sf /usr/share/zoneinfo/Europe/London /etc/localtime
hwclock --systohc

Name the computer (set up hostname)

echo {name} > /etc/hostname
echo 127.0.1.1 {name}.localdomain {name} >> /etc/hosts

Install zsh (if you prefer it to bash)

pacman -S zsh

Add your everyday user account and set the password

(replace zsh with bash if you skipped the last step)

useradd -m -g users -G wheel -s /bin/zsh {username}
passwd {username}

Add user to sudoers (optional)

Replace {editor} with the editor of choice - nano should already be installed.

EDITOR={editor} visudo

Uncomment the line below to allow all users in wheel group to run root commands

%wheel ALL=(ALL) ALL

Create a new initramfs file

Remember to update /etc/mkinitcpio.conf if you’re using an encrypted disk to make sure the correct things are loaded before running the following:

mkinitcpio -P

Set up grub (bootloader)

pacman -S grub
grub-install /dev/sda

If you have any customisations to make to the boot command line, make them in /etc/default/grub now!

grub-mkconfig -o /boot/grub/grub.cfg

Install any additional utilities, window managers etc.

I use the KDE/Plasma desktop and use SDDM as my display manager, so I’ll install these now.

pacman -S plasma sddm

And I need to enable the SDDM service so it’ll auto-load on boot:

systemctl enable sddm

I’ll also want to have a terminal installed for use in Plasma, I’ve been using Konsole for that:

pacman -S konsole

Final steps (and reboot)

Exit from the chroot shell, unmount all partitions and reboot:

exit
umount -R /mnt
reboot

Once you’ve rebooted and logged in, you may find you can’t get a network connection. If so, you’ll need to enable and start the NetworkManager service:

sudo systemctl enable NetworkManager
sudo systemctl start NetworkManager