How Do I Install Arch Linux?

Embarking on the journey to install Arch Linux can be both exciting and rewarding. Unlike many other Linux distributions, Arch provides users with the opportunity to build a bespoke system tailored to their preferences. In this guide, we’ll walk through the step-by-step process of installing Arch Linux, ensuring that you not only set up the system but also gain a deeper understanding of its inner workings.

Prerequisites

Before diving into the installation process, make sure you have the following:

A bootable Arch Linux USB drive
A computer with internet access
A backup of any important data on your device

Step 1: Booting into the Arch Linux Live Environment

Insert the USB drive and boot your computer from it. Once booted, you’ll find yourself in the Arch Linux live environment.

Step 2: Verify Internet Connection

Before proceeding, ensure that your internet connection is working. You can use the ping command to test connectivity.

ping -c 3 google.com

Step 3: Partitioning the Disk

Use a tool like cfdisk or fdisk to partition your disk. Create partitions for the root filesystem, swap space, and any additional partitions you may need.

Step 4: Formating Partitions

Format the partitions using the mkfs command. For example:

mkfs.ext4 /dev/sdX1      # Format root partition
mkswap /dev/sdX2         # Format swap partition
swapon /dev/sdX2         # Activate swap

Replace /dev/sdX1 and /dev/sdX2 with your actual partition names.

Step 5: Mounting Partitions

Mount the root partition to /mnt:

mount /dev/sdX1 /mnt

Step 6: Installing the Base System

Use the pacstrap command to install the base system and essential packages:

pacstrap /mnt base linux linux-firmware

Step 7: Generating fstab

Generate an fstab file to define how disk partitions should be mounted:

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

Step 8: Chroot into the Installed System

Enter the newly installed system:

arch-chroot /mnt

Step 9: Configuring the System

Set the time zone, localisation, and create the initial RAM disk:

ln -sf /usr/share/zoneinfo/Region/City /etc/localtime
hwclock --systohc

Uncomment the desired locale(s) in /etc/locale.gen and run:

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

Step 10: Setting Up Network

Create a hostname file and edit /etc/hosts:

echo "YourHostname" > /etc/hostname
echo "127.0.0.1     localhost" >> /etc/hosts
echo "::1           localhost" >> /etc/hosts
echo "127.0.1.1     YourHostname.localdomain YourHostname" >> /etc/hosts

Install a network manager, such as NetworkManager:

pacman -S networkmanager
systemctl enable NetworkManager

Step 11: Installing a Boot Loader

Install a boot loader; for example, GRUB:

pacman -S grub
grub-install --target=i386-pc /dev/sdX
grub-mkconfig -o /boot/grub/grub.cfg

Replace /dev/sdX with your actual drive.

Step 12: Creating a User and Password

Create a user and set a password:

useradd -m -g users -G wheel username
passwd username

Edit the sudoers file to allow the wheel group to use sudo:

visudo

Uncomment the line:

%wheel ALL=(ALL) ALL

Step 13: Rebooting

Exit the chroot environment, unmount partitions, and reboot:

exit
umount -R /mnt
reboot

Congratulations! You’ve successfully installed Arch Linux. Take the time to explore the Arch Wiki for further customisation and optimisation options to make your Linux experience truly unique.