Adding lots of cool stuff to dotfiles

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+# Arch Installation Documentation (non dual-boot)
+> by @notkaramel
+
+## Prerequisite
+- [ ] USB Drive (~800MB) with [archiso](https://archlinux.org/download/)
+    - From Windows: Use `rufus` to flash ISO to drive
+    - From Linux:
+        - Using `rpi-imager` (AUR) via custom image
+        - MultiWriter `gnome-multi-writer`
+
+## Network Configuration
+- Using wired connection is preferable
+- `archiso` has iwctl built-in. It can connect to regular IEEE 802.11x wifi, i.e., Wifi with SSID and passphrase.
+
+## Booting & Partition
+- Update system clock 
+```sh
+timedatectl set-ntp true
+```
+
+- Using `fdisk` for partitioning
+```sh
+fdisk -l # list all partitions
+fdisk /dev/device # e.g.: /dev/sda, /dev/nvme0n1
+```
+
+- Now you're inside `fdisk` CLI: `m` for help menu
+    0. If fresh install, or disk not GPT, do `g` to create new empty GPT table
+    1. `n`: new partition
+        - Partition number: go by default or your preferred order
+        - First sector: rcm go by default
+        - Last sector: use `+SIZE` to set partition size (e.g.: +500MiB, +2G)
+    2. `t`: change partition type
+        - Partition number: remember from previously determined
+        - `L` for option menu, `Q` to quit menu
+        - Recommend GPT table:
+
+        | Partition         | # | Type (`t` option) | Size      |
+        |-------------------|---|-------------------|-----------|
+        | EFI System        | 1 | EFI (1)           | +600MiB   |
+        | Swap (optional)   | 2 | Linux swap (19)   | +4GiB     |
+        | Root              | 3 | Linux root (23)   | +50GiB    |
+        | Home              | 4 | Linux home (42)   | the rest  |
+
+> Partition a swap if the PC has low RAM (swap's size should be 2x RAM)
+    3. `w`: write table to disk and exit
+    4. `q`: quit without saving changes
+
+- Format partitions
+```sh
+mkfs.fat -F 32 /dev/EFI_Partition
+mkswap /dev/SWAP_Partition
+mkfs.ext4 /dev/ROOT_and_HOME
+```
+
+- Mounting & activate partitions
+```sh
+swapon /dev/SWAP_Partition
+mount /dev/ROOT /mnt			
+mount /dev/HOME /mnt/home   
+mount --mkdir /dev/EFI /mnt/boot 	// for the EFI file system 
+```
+
+- Edit `/etc/pacman.conf` and enable `ParallelDownloads = ...` for faster download
+- Install essential packages (see [CorePackages.md](CorePackages.md) for more). `pacstrap` also have flags like `-K` to initialize empty pacman keyring
+```sh
+pacstrap /mnt base linux linux-firmware base base-devel # ... 
+```
+- Generate file system table `fstab`
+```sh
+genfstab -U /mnt >> /mnt/etc/fstab
+```
+
+- Now, `arch-chroot` to `/mnt` and go to next steps!
+
+## `arch-chroot` and root configuration
+
+> I highly recommend install `fish` shell of out-of-the-box suggestions.
+```sh
+pacman -S fish
+chsh root
+# New shell: /usr/bin/fish
+```
+
+- Set timezone
+```sh
+ln -sf /usr/share/zoneinfo/REGION/CITY /etc/localtime
+```
+- Set system clock to hardware (or vice versa, do `man hwclock`)
+```sh
+hwclock --systohc
+```
+
+- Get text editor of choice: `nano`, `vim`, `neovim`, etc.
+
+- Localization: uncomment locale in `/etc/locale.gen`
+    - e.g.: en\_CA.UTF-8, fr\_CA.UTF-8
+```sh
+locale-gen
+```
+
+- Create `locale.conf` to set up LANG
+```
+LANG=en_CA.UTF-8 
+```
+
+- Network Configuration
+    - In `/etc/hostname`:
+    ```
+    myHostName
+    ```
+    - In `/etc/hosts`:
+    ```
+    127.0.0.1		localhost 
+    ::1			    localhost 
+    127.0.1.1		myHostName 
+    ```
+- `mkinitcpio`
+```
+mkinitcpio -P # using all presets, see `man mkinitcpio` for more
+```
+
+- Root password using `passwd`
+- Add non-root user
+```
+useradd -m myUser # `-m` create a folder in /home/myUser
+passwd myUser # to set password
+```
+
+- Add user to access/privilege groups:
+```sh
+usermod -aG wheel,audio,video,optical,storage myUser
+```
+> later on, groups like `docker` for Docker dev, or `uucp` for embedded (Arduino) are also required
+
+- Install `sudo` and edit `visudo`. 
+```sh
+pacman -S sudo
+EDITOR=nvim visudo # visudo uses vi by default, but you can specify your preferred text editor
+```
+
+- Here, root user can determine how users should have access to sudo. It's good to have password whenever `sudo` is called, but users can opt-out
+```txt
+%wheel ALL = (ALL) ALL
+# %wheel ALL = (ALL) NOPASSWD: ALL
+```
+
+- Install GRUB and Dual-boot stuffs
+```sh
+pacman -S efitbootmgr os-prober grub
+```
+
+- Install `grub` to EFI menu (boot menu) && Generate GRUB config: 
+```sh
+grub-install --target=x86_64-efi --efi-directory=/boot --bootloader-id=GRUB –recheck
+grub-mkconfig -o /boot/grub/grub.cfg 
+```
+
+- Exit, unmount everything, and you're done!
+```sh
+exit # Ctrl + D
+umount -a /mnt # unmount all
+```
+
+## Source
+- [Arch Wiki Guide](https://wiki.archlinux.org/title/Installation_guide)
+- [DistroTube Guide](https://youtu.be/PQgyW10xD8s)
+- [Dual boot with Windows - ArchWiki](https://wiki.archlinux.org/title/Dual_boot_with_Windows)
+- [Partitioning - ArchWiki](https://wiki.archlinux.org/title/Partitioning#Discrete_partitions)
+- [EFI system partition - ArchWiki](https://wiki.archlinux.org/title/EFI_system_partition#Mount_the_partition)