Update Installation

Installation

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+### Simple, modern and secure installation of Arch Linux with KDE Plasma.
+
+# Load the preferred keyboard. In my case it's "de" for Germany.
+$ loadkeys de
+
+# List devices to make sure you partition the right device.
+$ lsblk
+
+# Partition the device using gdisk (assuming /dev/sda).
+$ gdisk /dev/sda
+
+# Create GPT and EFI-partion.
+$ o     # Creates new GPT-partition table.
+$ y     # Accept.
+$ n     # New partition.
+$ +512M # 512 MB should be plenty for /boot.
+$ ef00  # Mark as EFI.
+$ n     # New main partition, accept all the following using "y".
+
+# Print and check your partitions
+$ p
+
+# Write partitions to device
+$ w
+$ y     # Accept.
+
+# Encryp primary partition.
+$ cryptsetup -c aes-xts-plain -y -s 512 luksFormat /dev/sda2
+$ YES
+
+# Open encrypted partition, map as "root" and create filesystem.
+$ cryptseup luksOpen /dev/sda2 root
+$ mkfs.fat -F 32 -n UEFI /dev/sda1
+# -F specifies the type of file allocation tables used (12, 16 or 32 bit).
+# -n sets the volume name (label) of the filesystem to "UEFI".
+
+# Create ext4 filesystem on primary partition.
+$ mkfs.ext4 /dev/mapper/root
+
+# Create mountpoints and mount partitions.
+$ mount /dev/mapper/root /mnt
+$ mkdir /mnt/boot
+$ mount /dev/sda1 /mnt/boot
+
+# Optionally update mirrorlist using reflector.
+# In this case use the latest 10 mirrors from Germany, that have been synchronized within the last 24 hours and
+# sort the by download-rate and write them to the pacman mirrorlist. 
+$  reflector --verbose --latest 10 --country Germany --age 24 --sort rate --save /etc/pacman.d/mirrorlist
+
+# Install base system and basic packages (network, editor, sudo).
+# The package base-devel is not necessary but recommended.
+$ pacstrap /mnt base base-devel linux linux-firmware networkmanager nano sudo
+
+# Generate fstab.
+$ genfstab -Lp /mnt > /mnt/etc/fstab
+# -L = Use labels for source identifiers (shortcut for -t LABEL).
+# -p Exclude pseudofs mounts (default behavior).
+
+# Chroot into your installation.
+$ arch-chroot /mnt
+
+# Set your hostname.
+$ echo mycomputer > /etc/hostname
+
+# Generate locale.gen for your preferred language (and preferribly english).
+$ nano /etc/locale.gen
+# Uncomment your language, e.g. de_DE.UTF-8 UTF-8 (and en_US.UTF-8).
+
+# Generate the locale.
+$ locale-gen
+
+# Add necessary HOOKS and MODULES.
+$ nano /etc/mkinitcpio.conf
+
+# MODULES=(ext4)
+# HOOKS=(base udev autodetect modconf block keyboard keymap encrypt filesystems fsck shutdown)
+
+# Create mkinitcpio.
+$ mkinitcpio -p linux
+
+# Start NetworkManager for automatic network access on next boot.
+$ systemctl enable NetworkManager
+
+# Set a root-password.
+$ passwd
+
+# Install systemd-boot bootloader.
+$ bootctl install
+
+# Create the bootloader config.
+$ nano /bootloader/entries/arch.conf
+
+# Add the following:
+# title    Arch Linux
+# linux    /vmlinuz-linux
+# initrd   /initramfs-linux.img
+# options  cryptdevice=/dev/sda2:root root=/dev/mapper/root rw lang=de init=/usr/lib/systemd/systemd locale=de_DE.UTF-8
+
+# Create a fallback config.
+$ cp /boot/loader/entries/arch.conf /boot/loader/entries/arch-fallback.conf
+
+# Edit the fallback config.
+$ nano /boot/loader/entries/arch-fallback.conf
+
+# Change it to the following:
+# title    Arch Linux Fallback
+# initrd   /initramfs-linux-fallback.img
+
+# Edit loader config.
+$ nano /boot/loader/loader.conf
+
+Change it to the following:
+# timeout 1
+# default arch.conf
+
+# Exit and reboot
+$ exit
+$ umount /mnt/boot
+$ reboot
+
+# Enter encryption-password and login as root.
+
+# Set the keyboard to your preferred language permantently.
+$ echo KEYMAP=de-latin1-nodeadkeys > /etc/vconsole.conf
+
+# Create a user with a /home-directory.
+$ useradd -m myusername
+
+# Set password for your user.
+$ passwd myusername
+
+# Add myusername to group wheel for sudo access.
+$ gpasswd -a myusername wheel
+
+# Edit sudoers-file for sudo access.
+$ nano /etc/sudoers
+
+# Uncomment „%wheel ALL=(ALL) ALL“
+
+# Logout as root.
+$ exit
+
+# Login as you user.
+
+# Install SDDM and a minimal KDE Plasma.
+$ pacman -S sddm sddm-kcm plasma-desktop
+
+# Install KDE terminal for easier installation of packages in Plasma.
+$ pacman -S konsole
+
+# Enable and start SDDM to login to Plasma.
+$ systemctl enable sddm
+$ systemctl start sddm
+
+# Now you are logged in to your Plasma desktop environment and ready to configure and use your Arch Linux.
+
+# Suggested packages to install.
+
+# microcode (https://wiki.archlinux.org/index.php/Microcode)
+# kde-gtk-config (Adds graphical settings for GTK apps.)
+# kdeplasma-addons („All kind of addons to improve your Plasma experience.“)
+# kscreen (Adds screen section to graphical settings.)
+# ksystemlog (Graphical system log viewer)
+# partitionmanager (Graphical partition manager)
+# plasma-nm (Network manager applet)
+# plasma-pa (Audio manager applet)
+# powerdevil (Adds energy manager to graphical settings.)
+# spectacle (Graphical screenshot tool.)
+# systemd-swap (https://wiki.archlinux.org/index.php/swap#systemd-swap)