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Arch Install Helper Notes

Create bootable USB

sdX needs to be replaced by the correct USB letter

sudo dd if=/path/to/archlinux.iso of=/dev/sdX bs=8M status=progress && sync

Reboot system to boot from USB. Once in Arch shell, set up ntp and wifi.

timedatectl set-ntp true
wifi-menu
ping -c 3 www.google.com

Partition the disk with gdisk or fdisk

Depending on how you want your set up to be, set up partitions. For my use case, I want

/dev/sda
    /dev/sda1 1024MB  /boot       -> For Systemd-boot
    /dev/sda2 120GB   crypt/LVM  -> For the root and swap (Size dependent on your needs)
        archgrp-swap  8GB   swap  -> Swap partition (optional, if you want to do a Swapfile in root instead)
        archgrp-root  112GB xfs   -> Root partition
    /dev/sda3 810GB   crypt       -> Can be LVM if needed
        store         810GB xfs   -> For data/backup partition that will persist across distros

Now let's set this stuff up.

gdisk /dev/sda
GPT fdisk (gdisk) version 1.0.1

Partition table scan:
  MBR: protective
  BSD: not present
  APM: not present
  GPT: present

Found valid GPT with protective MBR; using GPT.

Command (? for help): ?
b	back up GPT data to a file
c	change a partition's name
d	delete a partition
i	show detailed information on a partition
l	list known partition types
n	add a new partition
o	create a new empty GUID partition table (GPT)
p	print the partition table
q	quit without saving changes
r	recovery and transformation options (experts only)
s	sort partitions
t	change a partition's type code
v	verify disk
w	write table to disk and exit
x	extra functionality (experts only)
?	print this menu

Command (? for help): o
This option deletes all partitions and creates a new protective MBR.
Proceed? (Y/N): Y

Command (? for help): n
Partition number (1-128, default 1): 
First sector (34-1953525134, default = 2048) or {+-}size{KMGTP}: 
Last sector (2048-1953525134, default = 1953525134) or {+-}size{KMGTP}: +1025M
Current type is 'Linux filesystem'
Hex code or GUID (L to show codes, Enter = 8300): EF00
Changed type of partition to 'EFI System'

Command (? for help): n
Partition number (2-128, default 2): 
First sector (34-1953525134, default = 2101248) or {+-}size{KMGTP}: 
Last sector (2101248-1953525134, default = 1953525134) or {+-}size{KMGTP}: +120G
Current type is 'Linux filesystem'
Hex code or GUID (L to show codes, Enter = 8300): 
Changed type of partition to 'Linux filesystem'

Command (? for help): n
Partition number (3-128, default 3): 
First sector (34-1953525134, default = 253759488) or {+-}size{KMGTP}: 
Last sector (253759488-1953525134, default = 1953525134) or {+-}size{KMGTP}: 
Current type is 'Linux filesystem'
Hex code or GUID (L to show codes, Enter = 8300): 
Changed type of partition to 'Linux filesystem'

Command (? for help): p
Disk /dev/sda: 1953525168 sectors, 931.5 GiB
Model: ST1000LM024 HN-M
Sector size (logical/physical): 512/4096 bytes
Disk identifier (GUID): C379CC43-EE63-4CD5-A0FA-E37EDDDA2C8D
Partition table holds up to 128 entries
Main partition table begins at sector 2 and ends at sector 33
First usable sector is 34, last usable sector is 1953525134
Partitions will be aligned on 2048-sector boundaries
Total free space is 2014 sectors (1007.0 KiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1            2048         2101247   1.0 GiB     EF00  EFI System
   2         2101248       253759487   120.0 GiB   8300  Linux filesystem
   3       253759488      1953525134   810.5 GiB   8300  Linux filesystem

Command (? for help): w

Now that we have all the partitions set, time to format and set up encryption and lvm.

Format, Encrypt and LVM

pacman -S cryptsetup lvm2 xfsprogs

mkfs.vfat -F32 /dev/sda1 # Format sda1 with Fat32

cryptsetup -v luksFormat /dev/sda2 # Encrypt sda2 with Luks
cryptsetup luksOpen /dev/sda2 arch # Open the newly encrypted drive and name it arch

pvcreate /dev/mapper/arch # Create a Physical Volume
vgcreate archgrp /dev/mapper/arch # Create a Volume Group named archgrp
lvcreate -L 8G archgrp -n swap # Create a Logical Volume for swap with size 8GB
lvcreate -l +100%FREE archgrp -n root # Create a Logical Volume for root with remaining size

mkswap -f /dev/mapper/archgrp-swap -L swap # Make swap, label it swap
mkfs.xfs -f /dev/mapper/archgrp-root -L archOS # Format root as XFS, label it archOS

cryptsetup -v luksFormat /dev/sda3 # Encrypt sda3 with Luks
cryptsetup luksOpen /dev/sda3 store # Open the newly encrypted drive and name it store

mount /dev/mapper/archgrp-root /mnt # Mount root at /mnt
swapon /dev/mapper/archgrp-swap # Mount swap

mkdir /mnt/boot # Create a dir inside root (/mnt)
mount /dev/sda1 /mnt/boot # Mount sda1 to /mnt/boot

Installing Arch base

# Open mirrorlist and choose nearby mirror and copy (Alt+6) and paste (Ctr+U) at top.
nano /etc/pacman.d/mirrorlist 
pacstrap /mnt base base-devel # Install the arch base and base-devel
genfstab -pU /mnt > /mnt/etc/fstab # Generate fstab

NOTE: For all non-boot partitions SSD partitions, edit /mnt/etc/fstab and change relatime to noatime.

chroot into the system and set it up

arch-chroot /mnt

# Set your timezone as Symbolic link to /etc/localtime
ln -s /usr/share/zoneinfo/America/Indianapolis /etc/localtime
hwclock --systohc

echo archOS > /etc/hostname # Set your hostname to archOS (or something else)

# Set your root password
passwd

# Create a user
# useradd -m -G additional_groups -s login_shell username
useradd -m -G wheel -s /bin/bash asadana # wheel group is used for admin, skip group for regular user.

# Set password for your new user
passwd asadana

# Make sure sudo is installed
pacman -S sudo

# Let's enable wheel as sudo users
EDITOR=nano visudo

Uncomment this line, then save and exit

%wheel ALL=(ALL) ALL

Set up locales

#Uncomment en_US.UTF-8 UTF-8 in /etc/locale.gen
nano /etc/locale.gen

# Echo UTF-8 to /etc/locale.conf
echo LANG=en_US.UTF-8 > /etc/locale.conf

locale-gen

Set up multilib and install a few basic things

nano /etc/pacman.conf # Edit pacman.conf
# Uncomment the following in /etc/pacman.conf

# Misc options
Color
.
.
.
[multilib]
Include = /etc/pacman.d/mirrorlist

Save, exit and sync

pacamn -Sy

Let's a couple things,

# Make sure your system has everything we are using
pacman -S cryptsetup lvm2 xfsprogs

# Some general tools, net-tools is optional but nice to have

pacman -S bash-completion dialog wpa_supplicant net-tools

# Xorg and drivers
pacman -S xorg-server xorg-server-utils xf86-video-intel

Set up systemd-boot

# install systemd-boot to /boot
bootctl --path=/boot install

Edit /etc/mkinitcpio.conf, add xfs to modules and add encrypt and lvm2 to hooks.

MODULES="xfs"
.
.
.
HOOKS="base udev autodetect modconf block keymap encrypt lvm2 resume filesystems keyboard fsck"

Configure bootloader entries for systemd-boot

Edit /boot/loader/loader.conf (This contains which entry is loaded by default, and timeout in seconds)

timeout 3
default arch
editor 0

Let's first check your /dev/sda2 UUID for the next step

blkid /dev/sda2

Create /boot/loader/entries/arch.conf (This contains arch linux entry to boot archOS we just installed)

title	Arch Linux
linux	/vmlinuz-linux
initrd	/initramfs-linux.img
options cryptdevice=UUID=<YOUR-/dev/sda2-UUID>:lvm:allow-discards resume=/dev/mapper/archgrp-swap root=/dev/mapper/archgrp-root rw

Finish installation and reboot the system

mkinitcpio -p linux
exit
cryptsetup luksClose /dev/sda2
cryptsetup luksClose /dev/sda3
umount -R /mnt
reboot

Upon reboot

You should be asked to decrypt before Arch is even loaded.

# Connect WiFi
wifi-menu

# Ping google
ping -c 3 google.com

Let's set up "Yay" for secure AUR access

# Install git and go for Yay
sudo pacman -S --noconfirm wget

mkdir temp # temporary dir for installing yay
cd temp
wget https://aur.archlinux.org/cgit/aur.git/snapshot/yay.tar.gz
tar -xvf yay.tar.gz
cd yay

# Review the PKGBUILD to make sure you know what the script is doing
cat PKGBUILD

# Install
makepkg -sri

Finally, unless you want a headless system, lets install a Desktop Environment.

sudo pacman -S plasma # "plasma is a group that will install general components of kde"
# For other groups and desktop environments see https://www.archlinux.org/groups/x86_64/

# Let's enable NetworkManager and SDDM for KDE.
sudo systemctl enable NetworkManager.service
sudo systemctl enable sddm.service

# Let's do a reboot just for a clean start
sudo shutdown -r now
#

Enjoy!