My variation on installing Arch

arch-linux-install

# Install ARCH Linux with encrypted file-system and UEFI
# The official installation guide (https://wiki.archlinux.org/index.php/Installation_Guide) contains a more verbose description.

# Download the archiso image from https://www.archlinux.org/
# Copy to a usb-drive
dd if=archlinux.img of=/dev/sdX bs=16M && sync # on linux

# Boot from the usb. If the usb fails to boot, make sure that secure boot is disabled in the BIOS configuration.


#verify boot mode
ls /sys/firmware/efi/efivars

#set up internet
ping archlinux.org

#update system clock
timedatectl set-ntp true

# parted --align optimal /dev/sda
(parted) mklabel gpt
(parted) mkpart ESP fat32 1MiB 513MiB
(parted) set 1 boot on
(parted) name 1 efi
(parted) mkpart primary 513MiB 800MiB
(parted) name 2 boot
(parted) mkpart primary 800MiB 100%
(parted) name 3 lvm-partition
(parted) print
(parted) quit

parted /dev/sda set 3 lvm on
parted /dev/sda print
pvcreate /dev/sda3
vgcreate  arch-lvm /dev/sda3

lvcreate -n arch-root -L 50G arch-lvm
lvcreate -n arch-swap -L 16G arch-lvm
lvcreate -n arch-home -l 100%FREE arch-lvm
lvs


mkfs.fat -F32 /dev/sda1
mkfs.ext2 /dev/sda2
mkfs.ext4 -L root /dev/arch-lvm/arch-root
mkfs.ext4 -L home /dev/arch-lvm/arch-home
mkswap /dev/arch-lvm/arch-swap
swapon /dev/arch-lvm/arch-swap

mount /dev/arch-lvm/arch-root /mnt
mkdir /mnt/{home,boot} 
mount /dev/sda2 /mnt/boot
mkdir /mnt/boot/efi
mount /dev/sda1 /mnt/boot/efi
mount /dev/arch-lvm/arch-home /mnt/home

pacstrap /mnt base base-devel efibootmgr nano git zsh xfce4 xfce4-goodies firefox lm-sensors nvme-cli \
hddtemp psensor tree tmux lsscsi --noconfirm

# 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

# 'install' 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
# Change relatime on all non-boot partitions to noatime (reduces wear if using an SSD)

# Enter the new system
arch-chroot /mnt /bin/bash

# Setup system clock
ln -s /usr/share/zoneinfo/Europe/Stockholm /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

# Add real user remove -s flag if you don't whish to use zsh
# useradd -m -g users -G wheel -s /bin/zsh MYUSERNAME
# passwd MYUSERNAME

# Configure mkinitcpio with modules needed for the initrd image
vim /etc/mkinitcpio.conf
# Add 'ext4' to MODULES
# Add 'encrypt' and 'lvm2' to HOOKS before filesystems

# 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/sdX3:luks:allow-discards" then run:
grub-mkconfig -o /boot/grub/grub.cfg

# Exit new system and go into the cd shell
exit

# Unmount all partitions
umount -R /mnt
swapoff -a

# Reboot into the new system, don't forget to remove the cd/usb
reboot