Originally from https://gist.github.com/mattiaslundberg/8620837. Copied here for my own archive.
Configure the wifi:
wifi-menu
Create partitions with fdisk
Setup the encryption of the system
cryptsetup luksFormat --type luks2 /dev/sdaX
Open the partition and make an ext4 file system
cryptsetup open /dev/sdaX cryptroot mkfs.ext4 /dev/mapper/cryptroot
Mount the new system
mount /dev/mapper/cryptroot /mnt # /mnt is the installed system mkdir /mnt/boot mount /dev/sda2 /mnt/boot mkdir /mnt/boot/efi mount /dev/sda1 /mnt/boot/efi
Install the system also includes stuff needed for starting wifi when first booting into the newly installed system Unless vim and zsh are desired these can be removed from the command
pacstrap /mnt base base-devel grub-efi-x86_64 zsh vim git efibootmgr dialog wpa_supplicant
Setup fstab
genfstab -pU /mnt >> /mnt/etc/fstab
Make /tmp a ramdisk (add the following line to /mnt/etc/fstab)
tmpfs /tmp tmpfs defaults,noatime,mode=1777 0 0
Enter the new system
arch-chroot /mnt /bin/bash
Setup system clock to local timezone
ln -s /usr/share/zoneinfo/America/New_York /etc/localtime hwclock --systohc --utc
Set the hostname
echo MYHOSTNAME > /etc/hostname
Update locale
echo LANG=en_US.UTF-8 >> /etc/locale.conf echo LANGUAGE=en_US >> /etc/locale.conf echo LC_ALL=C >> /etc/locale.conf
Set password for root
passwd
Configure mkinitcpio with modules needed for the initrd image
vim /etc/mkinitcpio.conf
Regenerate initrd image
mkinitcpio -p linux
Setup grub
grub-install
In /etc/default/grub edit the line GRUB_CMDLINE_LINUX to GRUB_CMDLINE_LINUX=“cryptdevice=/dev/sdaX:luks:allow-discards” then run:
grub-mkconfig -o /boot/grub/grub.cfg
Reboot