tldr arch linux installation guide

2-Operating-Systems/1-arch.md

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+# How to install Arch Linux: The TL;DR
+
+## Overview
+
+This guide is meant to be an opinionated and to the point guide on installing
+Arch Linux. Power users with different opinions should refer to the official
+[Arch Linux installation guide][1].
+
+[1]:https://wiki.archlinux.org/index.php/Installation_guide
+
+## Requirements
+ * A Linux computer to run early steps
+   * Can use an [Ubuntu live CD][1] if a Linux computer is not available
+ * A blank flash drive, 1GB+
+ * Target computer
+    * Known to be compatible with Linux
+    * Supports UEFI boot
+    * Has wireless card
+    * Does not require proprietary "out of tree" drivers
+
+[1]: https://www.ubuntu.com/download/desktop
+
+## Goals
+ * Full disk encryption
+ * Passwordless: Use GPG Smartcard for login, sudo, ssh
+ * Simple partitioning scheme
+
+## Steps
+
+1. Download latest Arch Linux ISO image file
+  1. Install torrent client such as aria2
+  2. Get latest .iso.torrent URL from [Arch Linux releases][1]
+  3. Download ISO with aria2.
+
+    Example:
+    ```
+    aria2c --on-download-complete=exit https://YOUR_TORRENT_URL_HERE
+    ```
+
+[1]: https://mirrors.kernel.org/archlinux/iso/latest/
+
+2. Write latest ISO to flash drive
+  1. List current storage devices with ```lsblk```
+  2. Insert flash drive
+  3. List current storage devices with ```lsblk``` again
+  4. Take note of new drive. Example: /dev/sdX
+  5. Use ```dd``` to write ISO image to drive
+
+    ```
+    sudo dd \
+      bs=4M \
+      if=archlinux-DATE-x86_64.iso \
+      of=/dev/sdX \
+      status=progress \
+      oflag=sync
+    ```
+  6. Remove flash drive
+
+3. Boot flash drive of target laptop
+  1. Insert flash drive
+  2. Boot laptop to BIOS screen
+    * e.g. F1, F2, F10, Delete, Escape while computer starts booting
+  3. Check that 'secure boot' is Disabled
+  4. Ensure USB drives will boot by default
+  5. Boot on installation medium
+
+4. Adjust rotation, fonts, keyboard layout
+  1. Change rotation if needed
+
+    ```
+    echo 1 > /sys/class/graphics/fbcon/rotate_all
+    ```
+   Note: May need to use 2 or 3 depending on starting state
+
+  2. Increase font size if needed
+
+    ```
+    setfont /usr/share/kbd/consolefonts/latarcyrheb-sun32.psfu.gz
+    ```
+    Note: This is the current largest font
+
+  3. Set desired keyboard layout (if not US standard)
+
+    Example: German
+    ```
+    loadkeys de-latin1
+    ```
+
+5. Connect to the internet
+  1. Select and join a wireless network with ```wifi-menu```
+  2. Verify connection with ```ping 1.1.1.1```
+
+6. Update system clock
+
+   ```
+   timedatectl set-ntp true
+   ```
+
+7. Set up encrypted disk
+  1. Determine target root device with ```lsblk```. Example: /dev/mmcblk0
+  2. Create all partitions
+
+    TL:DR;
+    ```
+    sgdisk -Zo -n 1:2048:+512M -t 1:EF00 -c 1:boot -N 2 -t 2:8300 -c 2:root /dev/mmcblk0
+    ```
+
+    Explanation:
+    ```
+    sgdisk \
+       -Zo             `# zero out any existing partitions` \
+       -n 1:2048:+512M `# create new 512M partition for boot` \
+       -t 1:EF00       `# set type to EFI` \
+       -c 1:boot       `# set comment/label to "boot"` \
+       -N 2            `# create second new partition filling rest of disk` \
+       -t 2:8300       `# set type Linux` \
+       -c 2:root       `# set comment/label to "root"` \
+       /dev/mmcblk0     # writing to your target drive
+     ```
+  3. Format the EFI boot partition as FAT32
+
+     ```
+     mkfs.vfat -F32 /dev/mmcblk0p1
+     ```
+
+  4. Encrypt and format the root partition
+
+     ```
+     # encrypt root partition with passphrase
+     cryptsetup -y -v luksFormat --type luks2 /dev/mmcblk0p2
+
+     # decrypt drive and expose as /dev/mapper/cryptroot
+     cryptsetup open /dev/mmcblk0p2 cryptroot
+
+     # make journaled ext4 partition in decrypted root device
+     mkfs.ext4 -j /dev/mapper/cryptroot
+     ```
+
+8. Mount the file systems
+
+  ```
+  mount /dev/mapper/cryptroot /mnt
+  mkdir /mnt/boot
+  mount /dev/mmcblk0p1 /mnt/boot
+  ```
+
+9. Select the Mirrors
+
+  ```
+  pacman -Sy pacman-contrib
+  curl https://www.archlinux.org/mirrorlist/all/https/ \
+  | sed 's/^#Server/Server/g' \
+  | rankmirrors -n 0 - \
+  > /etc/pacman.d/mirrorlist
+  ```
+  Note: This avoids manual mirror sorting. Native script does not yet exist.
+
+10. Install the base packages
+
+  ```
+  pacstrap /mnt base
+  ```
+
+11. Configure the System
+  1. Fstab: Generate 'File System TABle' of contents
+
+  ```
+  genfstab -U /mnt >> /mnt/etc/fstab
+  ```
+
+  2. Chroot: login to new arch installation by changing root
+
+  ```
+  arch-chroot /mnt
+  ```
+
+  3. Set time zone
+
+  ```
+  ln -sf /usr/share/zoneinfo/Region/City /etc/localtime
+  hwclock --systohc
+  ```
+
+  4. Localization: setting your preferred language
+
+  ```
+  # Uncomment preferred language in /etc/locale.gen
+  sed -i 's/^#en_US/en_US/g' /etc/locale.gen
+
+  # Create /etc/locale.conf and set default language
+  echo "LANG=en_US.UTF-8" > /etc/locale.conf
+
+  # Non-US keyboard users can set their default layout
+  echo "KEYMAP=de-latin1" > /etc/vconsole.conf
+  ```
+
+  5. Name your computer!
+
+  ```
+  # Create the hostname file
+  echo "computername" > /etc/hostname
+
+  # Specify new hostname for the network
+  echo "127.0.0.1 computername.localdomain computername localhost" > /etc/hosts
+  echo "::1 computername.localdomain computername localhost" >> /etc/hosts
+  ```
+
+  6. Initramfs: install system initialization bundle
+
+  ```
+  # Enable encryption support in initramfs
+  sed -i 's/ filesystems/ encrypt filesystems/g' /etc/mkinitcpio.conf
+
+  # Generate new initramfs
+  mkinitcpio -p linux
+  ```
+
+  7. Create a user with super user rights
+
+  ```
+  pacman -S sudo
+  echo "%wheel ALL=(ALL) ALL" >> /etc/sudoers
+  useradd -m -G wheel -s /bin/bash janedoe
+  passwd janedoe
+  ```
+
+  8. Configure and install bootloader
+
+  ```
+  bootctl --path=/boot install
+  echo "default arch" > /boot/loader/loader.conf
+  echo "title Arch Linux" >> /boot/loader/entries/arch.conf
+  echo "linux /vmlinuz-linux" >> /boot/loader/entries/arch.conf
+  echo "initrd /initramfs-linux.img" >> /boot/loader/entries/arch.conf
+  echo "options cryptdevice=UUID=$(blkid -o value /dev/mmcblk0p2 | head -n1):cryptroot root=/dev/mapper/cryptroot rw" >> /boot/loader/entries/arch.conf
+  ```
+
+  9. Install critical packages
+
+  ```
+  pacman -S dialog wpa_supplicant iw
+  ```
+
+  10. Boot into Arch
+    1. Shutdown with
+
+      ```
+      exit
+      shutdown -h now
+      ```
+
+    2. Remove flash drive
+
+    3. Boot computer
+
+## Recovery
+
+If you need to resume from a broken or partial install, perform steps 3-5 then:
+
+  ```
+  cryptsetup open /dev/mmcblk0p2 cryptroot
+  mount /dev/mapper/cryptroot /mnt
+  mount /dev/mmcblk0p1 /mnt/boot
+  arch-chroot /mnt
+  ```
+
+## References
+ * [Encrypting entire system with LUKS][1]
+
+[1]: https://wiki.archlinux.org/index.php/Dm-crypt/Encrypting_an_entire_system#LUKS_on_a_partition
+