mirror of
https://github.com/tommytran732/Arch-Setup-Script
synced 2024-11-09 12:11:33 -05:00
458 lines
18 KiB
Bash
458 lines
18 KiB
Bash
#!/bin/bash
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# Copyright (C) 2021-2024 Thien Tran, Tommaso Chiti
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may not
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# use this file except in compliance with the License. You may obtain a copy of
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# the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations under
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# the License.
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output(){
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echo -e '\e[36m'"$1"'\e[0m';
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}
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unpriv(){
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sudo -u nobody "$@"
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}
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install_mode_selector() {
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output 'Is this a desktop or server installation?'
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output '1) Desktop'
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output '2) Server'
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output 'Insert the number of your selection:'
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read -r choice
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case $choice in
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1 ) install_mode=desktop
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;;
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2 ) install_mode=server
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;;
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* ) output 'You did not enter a valid selection.'
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install_mode_selector
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esac
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}
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luks_password_prompt () {
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output 'Enter your encryption password (the password will not be shown on the screen):'
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read -r -s luks_password
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if [ -z "${luks_password}" ]; then
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output 'You need to enter a password.'
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luks_password_prompt
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fi
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output 'Confirm your encryption password (the password will not be shown on the screen):'
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read -r -s luks_password2
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if [ "${luks_password}" != "${luks_password2}" ]; then
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output 'Passwords do not match, please try again.'
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luks_password_prompt
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fi
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}
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disk_prompt (){
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lsblk
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output 'Please select the number of the corresponding disk (e.g. 1):'
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select entry in $(lsblk -dpnoNAME|grep -P "/dev/sd|nvme|vd");
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do
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disk="${entry}"
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output "Arch Linux will be installed on the following disk: ${disk}"
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break
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done
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}
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username_prompt (){
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output 'Enter your username:'
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read -r username
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if [ -z "${username}" ]; then
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output 'You need to enter a username.'
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username_prompt
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fi
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}
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user_password_prompt () {
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output 'Enter your user password (the password will not be shown on the screen):'
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read -r -s user_password
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if [ -z "${user_password}" ]; then
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output 'You need to enter a password.'
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user_password_prompt
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fi
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output 'Confirm your user password (the password will not be shown on the screen):'
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read -r -s user_password2
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if [ "${user_password}" != "${user_password2}" ]; then
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output 'Passwords do not match, please try again.'
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user_password_prompt
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fi
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}
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hostname_prompt (){
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if [ "${install_mode}" = 'server' ]; then
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output 'Enter your hostname:'
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read -r hostname
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if [ -z "${hostname}" ]; then
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output 'You need to enter a hostname.'
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hostname_prompt
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fi
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else
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hostname='localhost'
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fi
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}
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# Set hardcoded variables (temporary, these will be replaced by future prompts)
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locale=en_US
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kblayout=us
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# Cleaning the TTY.
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clear
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# Initial prompts
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install_mode_selector
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luks_password_prompt
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disk_prompt
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username_prompt
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user_password_prompt
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hostname_prompt
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# Check if this is a VM
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virtualization=$(systemd-detect-virt)
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# Installation
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## Updating the live environment usually causes more problems than its worth, and quite often can't be done without remounting cowspace with more capacity, especially at the end of any given month.
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pacman -Sy
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## Installing curl
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pacman -S --noconfirm curl
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## Formatting the disk
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wipefs -af "${disk}" &>/dev/null
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sgdisk -Zo "${disk}" &>/dev/null
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## Creating a new partition scheme.
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output "Creating new partition scheme on ${disk}."
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parted -s "${disk}" \
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mklabel gpt \
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mkpart ESP fat32 1MiB 513MiB \
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set 1 esp on \
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mkpart cryptroot 513MiB 100%
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ESP='/dev/disk/by-partlabel/ESP'
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cryptroot='/dev/disk/by-partlabel/cryptroot'
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## Informing the Kernel of the changes.
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output 'Informing the Kernel about the disk changes.'
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partprobe "${disk}"
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## Formatting the ESP as FAT32.
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output 'Formatting the EFI Partition as FAT32.'
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mkfs.fat -F 32 -s 2 "${ESP}" &>/dev/null
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## Creating a LUKS Container for the root partition.
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output 'Creating LUKS Container for the root partition.'
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echo -n "${luks_password}" | cryptsetup luksFormat --type luks1 ${cryptroot} -d - &>/dev/null
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echo -n "${luks_password}" | cryptsetup open ${cryptroot} cryptroot -d -
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BTRFS='/dev/mapper/cryptroot'
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## Formatting the LUKS Container as BTRFS.
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output 'Formatting the LUKS container as BTRFS.'
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mkfs.btrfs "${BTRFS}" &>/dev/null
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mount "${BTRFS}" /mnt
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## Creating BTRFS subvolumes.
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output 'Creating BTRFS subvolumes.'
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btrfs su cr /mnt/@ &>/dev/null
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btrfs su cr /mnt/@/.snapshots &>/dev/null
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mkdir -p /mnt/@/.snapshots/1 &>/dev/null
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btrfs su cr /mnt/@/.snapshots/1/snapshot &>/dev/null
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btrfs su cr /mnt/@/boot/ &>/dev/null
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btrfs su cr /mnt/@/home &>/dev/null
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btrfs su cr /mnt/@/root &>/dev/null
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btrfs su cr /mnt/@/srv &>/dev/null
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btrfs su cr /mnt/@/var_log &>/dev/null
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btrfs su cr /mnt/@/var_log_journal &>/dev/null
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btrfs su cr /mnt/@/var_crash &>/dev/null
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btrfs su cr /mnt/@/var_cache &>/dev/null
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btrfs su cr /mnt/@/var_tmp &>/dev/null
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btrfs su cr /mnt/@/var_spool &>/dev/null
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btrfs su cr /mnt/@/var_lib_libvirt_images &>/dev/null
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btrfs su cr /mnt/@/var_lib_machines &>/dev/null
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btrfs su cr /mnt/@/var_lib_gdm &>/dev/null
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btrfs su cr /mnt/@/var_lib_AccountsService &>/dev/null
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btrfs su cr /mnt/@/cryptkey &>/dev/null
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## Disable CoW on subvols we are not taking snapshots of
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chattr +C /mnt/@/boot
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chattr +C /mnt/@/home
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chattr +C /mnt/@/root
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chattr +C /mnt/@/srv
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chattr +C /mnt/@/var_log
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chattr +C /mnt/@/var_log_journal
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chattr +C /mnt/@/var_crash
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chattr +C /mnt/@/var_cache
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chattr +C /mnt/@/var_tmp
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chattr +C /mnt/@/var_spool
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chattr +C /mnt/@/var_lib_libvirt_images
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chattr +C /mnt/@/var_lib_machines
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chattr +C /mnt/@/var_lib_gdm
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chattr +C /mnt/@/var_lib_AccountsService
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chattr +C /mnt/@/cryptkey
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## Set the default BTRFS Subvol to Snapshot 1 before pacstrapping
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btrfs subvolume set-default "$(btrfs subvolume list /mnt | grep "@/.snapshots/1/snapshot" | grep -oP '(?<=ID )[0-9]+')" /mnt
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## Temporarily hardcode the date here, will make it work with proper date later.
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echo '<?xml version="1.0"?>
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<snapshot>
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<type>single</type>
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<num>1</num>
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<date>1999-03-31 0:00:00</date>
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<description>First Root Filesystem</description>
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<cleanup>number</cleanup>
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</snapshot>' > /mnt/@/.snapshots/1/info.xml
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chmod 600 /mnt/@/.snapshots/1/info.xml
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## Mounting the newly created subvolumes.
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umount /mnt
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output 'Mounting the newly created subvolumes.'
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mount -o ssd,noatime,compress=zstd "${BTRFS}" /mnt
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mkdir -p /mnt/{boot,root,home,.snapshots,srv,tmp,/var/log,/var/crash,/var/cache,/var/tmp,/var/spool,/var/lib/libvirt/images,/var/lib/machines,/var/lib/gdm,/var/lib/AccountsService,/cryptkey}
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mount -o ssd,noatime,compress=zstd,nodev,nosuid,noexec,subvol=@/boot "${BTRFS}" /mnt/boot
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mount -o ssd,noatime,compress=zstd,nodev,nosuid,subvol=@/root "${BTRFS}" /mnt/root
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mount -o ssd,noatime,compress=zstd,nodev,nosuid,subvol=@/home "${BTRFS}" /mnt/home
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mount -o ssd,noatime,compress=zstd,subvol=@/.snapshots "${BTRFS}" /mnt/.snapshots
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mount -o ssd,noatime,compress=zstd,subvol=@/srv "${BTRFS}" /mnt/srv
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mount -o ssd,noatime,compress=zstd,nodatacow,nodev,nosuid,noexec,subvol=@/var_log "${BTRFS}" /mnt/var/log
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### Toolbox (https://github.com/containers/toolbox) needs /var/log/journal to have dev, suid, and exec, Thus I am splitting the subvolume. Need to make the directory after /mnt/var/log/ has been mounted.
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mkdir -p /mnt/var/log/journal
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mount -o ssd,noatime,compress=zstd,nodatacow,subvol=@/var_log_journal "${BTRFS}" /mnt/var/log/journal
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mount -o ssd,noatime,compress=zstd,nodatacow,nodev,nosuid,noexec,subvol=@/var_crash "${BTRFS}" /mnt/var/crash
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mount -o ssd,noatime,compress=zstd,nodatacow,nodev,nosuid,noexec,subvol=@/var_cache "${BTRFS}" /mnt/var/cache
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mount -o ssd,noatime,compress=zstd,nodatacow,nodev,nosuid,noexec,subvol=@/var_tmp "${BTRFS}" /mnt/var/tmp
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mount -o ssd,noatime,compress=zstd,nodatacow,nodev,nosuid,noexec,subvol=@/var_spool "${BTRFS}" /mnt/var/spool
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mount -o ssd,noatime,compress=zstd,nodatacow,nodev,nosuid,noexec,subvol=@/var_lib_libvirt_images "${BTRFS}" /mnt/var/lib/libvirt/images
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mount -o ssd,noatime,compress=zstd,nodatacow,nodev,nosuid,noexec,subvol=@/var_lib_machines "${BTRFS}" /mnt/var/lib/machines
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### The encryption is splitted as we do not want to include it in the backup with snap-pac.
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mount -o ssd,noatime,compress=zstd,nodatacow,nodev,nosuid,noexec,subvol=@/cryptkey "${BTRFS}" /mnt/cryptkey
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mkdir -p /mnt/boot/efi
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mount -o nodev,nosuid,noexec "${ESP}" /mnt/boot/efi
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## Check the microcode to install.
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if [ "${virtualization}" = 'none' ]; then
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CPU=$(grep vendor_id /proc/cpuinfo)
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if [[ "${CPU}" == *"AuthenticAMD"* ]]; then
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microcode=amd-ucode
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else
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microcode=intel-ucode
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fi
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fi
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## Pacstrap
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output 'Installing the base system (it may take a while).'
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pacstrap /mnt apparmor base chrony efibootmgr firewalld grub grub-btrfs inotify-tools linux-firmware linux-hardened linux-lts "${microcode}" nano networkmanager reflector sbctl snapper sudo zram-generator
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if [ "${install_mode}" = 'desktop' ]; then
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pacstrap /mnt nautilus gdm gnome-console gnome-control-center pipewire-alsa pipewire-pulse pipewire-jack
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elif [ "${install_mode}" = 'server' ]; then
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pacstrap /mnt openssh
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fi
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if [ "${virtualization}" = 'none' ]; then
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pacstrap /mnt fwupd
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echo 'UriSchemes=file;https' | sudo tee -a /mnt/etc/fwupd/fwupd.conf
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elif [ "${virtualization}" = 'kvm' ]; then
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pacstrap /mnt qemu-guest-agent
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if [ "${install_mode}" = 'desktop' ]; then
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pacstrap /mnt spice-vdagent
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fi
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fi
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## Install snap-pac list otherwise we will have problems
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pacstrap /mnt snap-pac
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## Generate /etc/fstab.
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output 'Generating a new fstab.'
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genfstab -U /mnt >> /mnt/etc/fstab
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sed -i 's#,subvolid=258,subvol=/@/.snapshots/1/snapshot,subvol=@/.snapshots/1/snapshot##g' /mnt/etc/fstab
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output 'Setting up hostname, locale and keyboard layout'
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## Set hostname.
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echo "$hostname" > /mnt/etc/hostname
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## Setting hosts file.
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echo 'Setting hosts file.'
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echo "127.0.0.1 localhost
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::1 localhost
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127.0.1.1 $hostname.localdomain $hostname" > /mnt/etc/hosts
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## Setup locales.
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echo "$locale.UTF-8 UTF-8" > /mnt/etc/locale.gen
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echo "LANG=$locale.UTF-8" > /mnt/etc/locale.conf
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## Setup keyboard layout.
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echo "KEYMAP=$kblayout" > /mnt/etc/vconsole.conf
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## Configure /etc/mkinitcpio.conf
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output 'Configuring /etc/mkinitcpio for ZSTD compression and LUKS hook.'
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sed -i 's/#COMPRESSION="zstd"/COMPRESSION="zstd"/g' /mnt/etc/mkinitcpio.conf
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sed -i 's/^HOOKS=.*/HOOKS=(systemd autodetect microcode modconf kms keyboard sd-vconsole block sd-encrypt filesystems)/g' /mnt/etc/mkinitcpio.conf
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## Enable LUKS in GRUB and setting the UUID of the LUKS container.
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sed -i 's/#GRUB_ENABLE_CRYPTODISK=.*/GRUB_ENABLE_CRYPTODISK=y/g' /mnt/etc/default/grub
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echo '' >> /mnt/etc/default/grub
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echo '# Booting with BTRFS subvolume
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GRUB_BTRFS_OVERRIDE_BOOT_PARTITION_DETECTION=true' >> /mnt/etc/default/grub
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## Disable root subvol pinning.
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## This is **extremely** important, as snapper expects to be able to set the default btrfs subvol.
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# shellcheck disable=SC2016
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sed -i 's/rootflags=subvol=${rootsubvol}//g' /mnt/etc/grub.d/10_linux
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# shellcheck disable=SC2016
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sed -i 's/rootflags=subvol=${rootsubvol}//g' /mnt/etc/grub.d/20_linux_xen
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## Kernel hardening
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UUID=$(blkid -s UUID -o value "${cryptroot}")
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sed -i "s#quiet#rd.luks.name=${UUID}=cryptroot root=${BTRFS} mitigations=auto,nosmt spectre_v2=on spectre_bhi=on spec_store_bypass_disable=on tsx=off kvm.nx_huge_pages=force nosmt=force l1d_flush=on spec_rstack_overflow=safe-ret gather_data_sampling=force reg_file_data_sampling=on random.trust_bootloader=off random.trust_cpu=off intel_iommu=on amd_iommu=force_isolation efi=disable_early_pci_dma iommu=force iommu.passthrough=0 iommu.strict=1 slab_nomerge init_on_alloc=1 init_on_free=1 pti=on vsyscall=none ia32_emulation=0 page_alloc.shuffle=1 randomize_kstack_offset=on debugfs=off lockdown=confidentiality module.sig_enforce=1#g" /mnt/etc/default/grub
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## Add keyfile to the initramfs to avoid double password.
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dd bs=512 count=4 if=/dev/random of=/mnt/cryptkey/.root.key iflag=fullblock &>/dev/null
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chmod 000 /mnt/cryptkey/.root.key &>/dev/null
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echo -n "${luks_password}" | cryptsetup luksAddKey /dev/disk/by-partlabel/cryptroot /mnt/cryptkey/.root.key -d -
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sed -i 's#FILES=()#FILES=(/cryptkey/.root.key)#g' /mnt/etc/mkinitcpio.conf
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sed -i "s#module.sig_enforce=1#module.sig_enforce=1 rd.luks.key=/cryptkey/.root.key#g" /mnt/etc/default/grub
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## Continue kernel hardening
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unpriv curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/etc/modprobe.d/30_security-misc.conf | tee /mnt/etc/modprobe.d/30_security-misc.conf
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sudo sed -i 's/#[[:space:]]*install msr/install msr/g' /mnt/etc/modprobe.d/30_security-misc.conf
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if [ "${install_mode}" != 'server' ]; then
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sudo sed -i 's/#[[:space:]]*install bluetooth/install bluetooth/g' /mnt/etc/modprobe.d/30_security-misc.conf
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sudo sed -i 's/#[[:space:]]*install btusb/install btusb/g' /mnt/etc/modprobe.d/30_security-misc.conf
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fi
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unpriv curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/usr/lib/sysctl.d/990-security-misc.conf | tee /mnt/etc/sysctl.d/990-security-misc.conf
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sed -i 's/kernel\.yama\.ptrace_scope[[:space:]]*=.*/kernel.yama.ptrace_scope=3/g' /mnt/etc/sysctl.d/990-security-misc.conf
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unpriv curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/etc/sysctl.d/30_silent-kernel-printk.conf | tee /mnt/etc/sysctl.d/30_silent-kernel-printk.conf
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unpriv curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/etc/sysctl.d/30_security-misc_kexec-disable.conf | tee /mnt/etc/sysctl.d/30_security-misc_kexec-disable.conf
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## Setup NTS
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unpriv curl https://raw.githubusercontent.com/GrapheneOS/infrastructure/main/chrony.conf | tee /mnt/etc/chrony.conf
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unpriv curl https://raw.githubusercontent.com/TommyTran732/Linux-Setup-Scripts/main/etc/sysconfig/chronyd | tee /etc/sysconfig/chronyd
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## Remove nullok from system-auth
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sed -i 's/nullok//g' /mnt/etc/pam.d/system-auth
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## Disable coredump
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unpriv curl https://raw.githubusercontent.com/TommyTran732/Linux-Setup-Scripts/main/etc/security/limits.d/30-disable-coredump.conf | tee /mnt/etc/security/limits.d/30-disable-coredump.conf
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## ZRAM configuration
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unpriv curl https://raw.githubusercontent.com/TommyTran732/Linux-Setup-Scripts/main/etc/systemd/zram-generator.conf | tee /mnt/etc/systemd/zram-generator.conf
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## Setup Networking
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if [ "${install_mode}" = "desktop" ]; then
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unpriv curl https://raw.githubusercontent.com/TommyTran732/Linux-Setup-Scripts/main/etc/NetworkManager/conf.d/00-macrandomize.conf | tee /mnt/etc/NetworkManager/conf.d/00-macrandomize.conf
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unpriv curl https://raw.githubusercontent.com/TommyTran732/Linux-Setup-Scripts/main/etc/NetworkManager/conf.d/01-transient-hostname.conf | tee /mnt/etc/NetworkManager/conf.d/01-transient-hostname.conf
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fi
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unpriv curl https://gitlab.com/divested/brace/-/raw/master/brace/usr/lib/systemd/system/NetworkManager.service.d/99-brace.conf | tee /mnt/etc/systemd/system/NetworkManager.service.d/99-brace.conf
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## Configuring the system.
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arch-chroot /mnt /bin/bash -e <<EOF
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# Setting up timezone.
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# Temporarily hardcoding here
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ln -sf /usr/share/zoneinfo/America/New_York /etc/localtime &>/dev/null
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# Setting up clock.
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hwclock --systohc
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# Generating locales.my keys aren't even on
|
|
echo "Generating locales."
|
|
locale-gen
|
|
|
|
# Create SecureBoot keys. This isn't strictly necessary, but certain things like linux-hardened preset expects it and mkinitcpio will fail without it, sooo...
|
|
sbctl create-keys
|
|
|
|
# Generating a new initramfs.
|
|
echo "Creating a new initramfs."
|
|
chmod 600 /boot/initramfs-linux*
|
|
mkinitcpio -P
|
|
|
|
# Installing GRUB.
|
|
echo "Installing GRUB on /boot."
|
|
grub-install --target=x86_64-efi --efi-directory=/boot/efi --bootloader-id=GRUB --modules="normal test efi_gop efi_uga search echo linux all_video gfxmenu gfxterm_background gfxterm_menu gfxterm loadenv configfile gzio part_gpt cryptodisk luks gcry_rijndael gcry_sha256 btrfs" --disable-shim-lock
|
|
|
|
# Creating grub config file.
|
|
echo "Creating GRUB config file."
|
|
grub-mkconfig -o /boot/grub/grub.cfg
|
|
|
|
# Adding user with sudo privilege
|
|
if [ -n "$username" ]; then
|
|
echo "Adding $username with root privilege."
|
|
useradd -m $username
|
|
usermod -aG wheel $username
|
|
fi
|
|
|
|
# Snapper configuration
|
|
umount /.snapshots
|
|
rm -r /.snapshots
|
|
snapper --no-dbus -c root create-config /
|
|
btrfs subvolume delete /.snapshots
|
|
mkdir /.snapshots
|
|
mount -a
|
|
chmod 750 /.snapshots
|
|
EOF
|
|
|
|
## Set user password.
|
|
[ -n "$username" ] && echo "Setting user password for ${username}." && echo -e "${user_password}\n${user_password}" | arch-chroot /mnt passwd "$username" &>/dev/null
|
|
|
|
## Give wheel user sudo access.
|
|
sed -i 's/# \(%wheel ALL=(ALL\(:ALL\|\)) ALL\)/\1/g' /mnt/etc/sudoers
|
|
|
|
## Enable services
|
|
systemctl enable apparmor --root=/mnt
|
|
systemctl enable chronyd --root=/mnt
|
|
systemctl enable firewalld --root=/mnt
|
|
systemctl enable fstrim.timer --root=/mnt
|
|
systemctl enable gdm.service --root=/mnt
|
|
systemctl enable grub-btrfsd.service --root=/mnt
|
|
systemctl enable NetworkManager --root=/mnt
|
|
systemctl enable reflector.timer --root=/mnt
|
|
systemctl enable snapper-timeline.timer --root=/mnt
|
|
systemctl enable snapper-cleanup.timer --root=/mnt
|
|
systemctl enable systemd-oomd --root=/mnt
|
|
systemctl disable systemd-timesyncd --root=/mnt
|
|
|
|
if [ "${install_mode}" = 'desktop' ]; then
|
|
systemctl enable gdm --root=/mnt
|
|
fi
|
|
|
|
if [ "${install_mode}" = 'server' ]; then
|
|
systemctl enable sshd --root=/mnt
|
|
fi
|
|
|
|
## Set umask to 077.
|
|
sudo sed -i 's/^UMASK.*/UMASK 077/g' /mnt/etc/login.defs
|
|
sudo sed -i 's/^HOME_MODE/#HOME_MODE/g' /mnt/etc/login.defs
|
|
sudo sed -i 's/^USERGROUPS_ENAB.*/USERGROUPS_ENAB no/g' /mnt/etc/login.defs
|
|
sudo sed -i 's/umask 022/umask 077/g' /mnt/etc/bash.bashrc
|
|
|
|
# Finish up
|
|
echo "Done, you may now wish to reboot (further changes can be done by chrooting into /mnt)."
|
|
exit |