Check Partitions:

lsblk

Delete the partition in which Arch is to be installed: (If not clean installing then skip this)

gdisk /dev/sda	#(Can be sdb, sdc, etc)

Then enter options:

x
z
y
y

Preparing the partitions:

cgdisk /dev/sda

1. Boot Partition:	
	First Option: Blank Always
	Size: 1024MiB
	Hex Code: EF00
	Name: boot

2. Swap Partition:
	Size: 8GiB	#(It's enough but can be increased if needed)
	Hex Code: 8200
	Name: swap

3. Root Partition:
	Size: Blank	#(Rest of the space in the drive)
	Hex Code: Blank	
	Name: root

Then select 'write' and then 'quit'.

Making filesystems:

1. mkfs.fat -F32 /dev/sda1

2. mkswap /dev/sda2

3. mkfs.ext4 /dev/sda3

Mounting the partitions:

1. mount /dev/sda3 /mnt

2. mkdir /mnt/boot

3. mount /dev/sda1 /mnt/boot

Installing the base system:

pacstrap -i /mnt base linux linux-firmware sudo nano

Generating fstab:

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

Chroot:

arch-chroot /mnt /bin/bash

Setting Locale:

1. nano /etc/locale.gen

2. Press Ctrl+W and search for en_US.UTF-8. Do it again, remove # and exit nano

3. locale-gen

4. echo LANG=en_US.UTF-8 > /etc/locale.conf

5. export LANG=en_US.UTF-8

Set Time, Region and Hostname:

1. ln -s /usr/share/zoneinfo/Asia/Kolkata > /etc/localtime	#(This is for me but the region can be changed after searching for it a bit)

2. hwclock --systohc --utc

3. echo host_name > /etc/hostname	#(Replace host_name with whatever hostname is desired)

4. sudo systemctl enable fstrim.timer

Enable some extra repositories (If you want to.):

1. nano /etc/pacman.conf

2. uncomment out the ones you like (For example: multilib, etc)

Set Root password:

1. passwd

2. enter the root password

Add user:

useradd -m -g users -G wheel,storage,power -s /bin/bash user_name	#(Replace user_name with desired username)

Setting user password:

passwd user_name

Setting sudo:

1. EDITOR=nano visudo

2. Press Ctrl+W, search for wheel, uncomment and add at the end: Defaults rootpw

Install bash completion:

pacman -S bash-completion

Install Bootloader (Grub):

1. pacman -S grub efibootmgr intel-ucode

2. mkdir /boot/efi

3. mount /dev/sda1 /boot/efi

4. lsblk (To check if it mounted correctly.)

5. grub-install --target=x86_64-efi --bootloader-id=GRUB --efi-directory=/boot/efi --recheck

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

Optional: Dual Boot with Windows 10

1. pacman -S os-prober

2. fdisk -l /dev (To check in which partition Windows boot EFI file is located. It should be located in a partition of size ~260MB called Windows EFI boot or EFI system or something)

In my case the partition turned out to be /dev/nvme0n1p2 but it may be different for everyone.

3. mount /dev/nvme0n1p2 /mnt

4. os-prober

5. Backup existing grub config: cp /boot/grub/grub.cfg /boot/grub/grub.cfg-origin

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

Set up Network Manager:

1. pacman -S networkmanager

2. systemctl enable NetworkManager.service

Optional: Install Graphic Card drivers:

First do an lspci to check for the Graphic cards attached.

For Intel:

	1. pacman -S xf86-video-intel libgl mesa

For NVIDIA:

	1. pacman -S nvidia nvidia-lts nvidia-libgl mesa

Exit and reboot:

1. exit

2. umount -R /mnt

3. reboot

After rebooting Enter username and password and then install the basic necessities:

sudo pacman -S dkms linux-headers xf86-input-libinput xorg-xinput mesa xorg-server xorg-apps xorg-xinit xorg-twm xorg-xclock xfce4-terminal plasma sddm ccache ntfs-3g

#(Here plasma and sddm can be replaced with gnome and gdm for GNOME desktop environment)

Enabling the display manager:

sudo systemctl enable sddm.service 

Now the installation is complete so sudo reboot

All set to go. Install desired apps and themes along with yay.