mirror of
https://github.com/tommytran732/Arch-Setup-Script
synced 2024-11-09 04:01:33 -05:00
483 lines
18 KiB
Bash
483 lines
18 KiB
Bash
#!/bin/bash
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#!/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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read -r -p "Select the installation type: " choice
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case $choice in
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1 ) install_mode=desktop
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;;
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2 ) install_mode=server
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;;
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* ) output "You did not enter a valid selection."
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install_mode_selector
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esac
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}
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# Selecting the kernel flavor to install.
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kernel_selector () {
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output "List of kernels:"
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output "1) Stable — Vanilla Linux kernel and modules, with a few patches applied."
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output "2) Hardened — A security-focused Linux kernel."
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output "3) Longterm — Long-term support (LTS) Linux kernel and modules."
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output "4) Zen Kernel — Optimized for desktop usage."
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read -r -p "Insert the number of the corresponding kernel:" choice
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output "$choice will be installed"
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case $choice in
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1 ) kernel=linux
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;;
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2 ) kernel=linux-hardened
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;;
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3 ) kernel=linux-lts
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;;
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4 ) kernel=linux-zen
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;;
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* ) output "You did not enter a valid selection."
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kernel_selector
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esac
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}
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luks_password_prompt () {
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output "Enter your encryption password (the password will not be shown on the screen):"
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read -r -s luks_password
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if [ -z "${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 don't 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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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: ${disk}"
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break
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done
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}
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username_prompt (){
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output "Enter your username:"
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read -r username
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if [ "${username}" = '' ]; then
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output "You need to enter a password."
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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}" != "${user_password2}" ]; then
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output "Passwords don't match, please try again."
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user_password_prompt
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fi
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}
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# Set hardcoded variables (temporary, these will be replaced by future prompts)
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hostname=localhost
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locale=en_US
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kblayout=us
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# Cleaning the TTY.
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clear
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# Initial prompts
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install_mode_selector
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kernel_selector
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luks_password_prompt
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disk_prompt
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username_prompt
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user_password_prompt
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# Check if this is a VM
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virtualization=$(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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echo "Mounting the newly created subvolumes."
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mount -o ssd,noatime,space_cache,compress=zstd:3 "${BTRFS}" /mnt
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mkdir -p /mnt/{boot,root,home,.snapshots,srv,tmp,/var/log,/var/crash,/var/cache,/var/tmp,/var/spool,/var/lib/libvirt/images,/var/lib/machines,/var/lib/gdm,/var/lib/AccountsService,/cryptkey}
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mount -o ssd,noatime,compress=zstd,nodev,nosuid,noexec,subvol=@/boot "${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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## Checking 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 (setting up a base sytem onto the new root).
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## As I said above, I am considering replacing gnome-software with pamac-flatpak-gnome as PackageKit seems very buggy on Arch Linux right now.
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echo "Installing the base system (it may take a while)."
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pacstrap /mnt base ${kernel} ${microcode} linux-firmware grub grub-btrfs snapper snap-pac efibootmgr sudo networkmanager apparmor firewalld zram-generator reflector chrony sbctl openssh fwupd
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# Generating /etc/fstab.
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echo "Generating a new fstab."
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genfstab -U /mnt >> /mnt/etc/fstab
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sed -i 's#,subvolid=258,subvol=/@/.snapshots/1/snapshot,subvol=@/.snapshots/1/snapshot##g' /mnt/etc/fstab
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# Setting hostname.
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read -r -p "Please enter the hostname: " hostname
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echo "$hostname" > /mnt/etc/hostname
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# Setting hosts file.
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echo "Setting hosts file."
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cat > /mnt/etc/hosts <<EOF
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127.0.0.1 localhost
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::1 localhost
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127.0.1.1 $hostname.localdomain $hostname
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EOF
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# Setting up locales.
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echo "$locale.UTF-8 UTF-8" > /mnt/etc/locale.gen
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echo "LANG=$locale.UTF-8" > /mnt/etc/locale.conf
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# Setting up keyboard layout.
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read -r -p "Please insert the keyboard layout you use: " kblayout
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echo "KEYMAP=$kblayout" > /mnt/etc/vconsole.conf
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# Configuring /etc/mkinitcpio.conf
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echo "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=(base udev autodetect microcode modconf kms keyboard keymap consolefont block filesystems fsck),HOOKS=(base udev autodetect microcode modconf kms keyboard keymap consolefont block encrypt filesystems fsck),g' /mnt/etc/mkinitcpio.conf
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# Enabling LUKS in GRUB and setting the UUID of the LUKS container.
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UUID=$(blkid $cryptroot | cut -f2 -d'"')
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sed -i 's/#\(GRUB_ENABLE_CRYPTODISK=y\)/\1/' /mnt/etc/default/grub
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echo "" >> /mnt/etc/default/grub
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echo -e "# Booting with BTRFS subvolume\nGRUB_BTRFS_OVERRIDE_BOOT_PARTITION_DETECTION=true" >> /mnt/etc/default/grub
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sed -i 's#rootflags=subvol=${rootsubvol}##g' /mnt/etc/grub.d/10_linux
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sed -i 's#rootflags=subvol=${rootsubvol}##g' /mnt/etc/grub.d/20_linux_xen
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# Enabling CPU Mitigations
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curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/etc/default/grub.d/40_cpu_mitigations.cfg -o /mnt/etc/grub.d/40_cpu_mitigations.cfg
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# Distrusting the CPU
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curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/etc/default/grub.d/40_distrust_cpu.cfg -o /mnt/etc/grub.d/40_distrust_cpu.cfg
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# Enabling IOMMU
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curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/etc/default/grub.d/40_enable_iommu.cfg -o /mnt/etc/grub.d/40_enable_iommu.cfg
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# Enabling NTS
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curl https://raw.githubusercontent.com/GrapheneOS/infrastructure/main/chrony.conf -o /mnt/etc/chrony.conf
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# Setting GRUB configuration file permissions
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chmod 755 /mnt/etc/grub.d/*
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# Adding 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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cryptsetup -v luksAddKey /dev/disk/by-partlabel/cryptroot /mnt/cryptkey/.root.key
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sed -i "s#quiet#cryptdevice=UUID=$UUID:cryptroot root=$BTRFS lsm=landlock,lockdown,yama,apparmor,bpf cryptkey=rootfs:/cryptkey/.root.key#g" /mnt/etc/default/grub
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sed -i 's#FILES=()#FILES=(/cryptkey/.root.key)#g' /mnt/etc/mkinitcpio.conf
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# Configure AppArmor Parser caching
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sed -i 's/#write-cache/write-cache/g' /mnt/etc/apparmor/parser.conf
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sed -i 's,#Include /etc/apparmor.d/,Include /etc/apparmor.d/,g' /mnt/etc/apparmor/parser.conf
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# Blacklisting kernel modules
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curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/etc/modprobe.d/30_security-misc.conf -o /mnt/etc/modprobe.d/30_security-misc.conf
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chmod 600 /mnt/etc/modprobe.d/*
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# Security kernel settings.
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curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/usr/lib/sysctl.d/990-security-misc.conf -o /mnt/etc/sysctl.d/990-security-misc.conf
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sed -i 's/kernel.yama.ptrace_scope=2/kernel.yama.ptrace_scope=3/g' /mnt/etc/sysctl.d/990-security-misc.conf
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curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/etc/sysctl.d/30_silent-kernel-printk.conf -o /mnt/etc/sysctl.d/30_silent-kernel-printk.conf
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curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/etc/sysctl.d/30_security-misc_kexec-disable.conf -o /mnt/etc/sysctl.d/30_security-misc_kexec-disable.conf
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chmod 600 /mnt/etc/sysctl.d/*
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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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echo "* hard core 0" >> /mnt/etc/security/limits.conf
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# Disable su for non-wheel users
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bash -c 'cat > /mnt/etc/pam.d/su' <<-'EOF'
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#%PAM-1.0
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auth sufficient pam_rootok.so
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# Uncomment the following line to implicitly trust users in the "wheel" group.
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#auth sufficient pam_wheel.so trust use_uid
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# Uncomment the following line to require a user to be in the "wheel" group.
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auth required pam_wheel.so use_uid
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auth required pam_unix.so
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account required pam_unix.so
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session required pam_unix.so
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EOF
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# ZRAM configuration
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bash -c 'cat > /mnt/etc/systemd/zram-generator.conf' <<-'EOF'
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[zram0]
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zram-fraction = 1
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max-zram-size = 8192
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EOF
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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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ln -sf /usr/share/zoneinfo/$(curl -s http://ip-api.com/line?fields=timezone) /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
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echo "Generating locales."
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locale-gen &>/dev/null
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# Generating a new initramfs.
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echo "Creating a new initramfs."
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chmod 600 /boot/initramfs-linux* &>/dev/null
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mkinitcpio -P &>/dev/null
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# Snapper configuration
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umount /.snapshots
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rm -r /.snapshots
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snapper --no-dbus -c root create-config /
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btrfs subvolume delete /.snapshots
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mkdir /.snapshots
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mount -a
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chmod 750 /.snapshots
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|
|
# Installing GRUB.
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|
echo "Installing GRUB on /boot."
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|
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 &>/dev/null
|
|
|
|
# Creating grub config file.
|
|
echo "Creating GRUB config file."
|
|
grub-mkconfig -o /boot/grub/grub.cfg &>/dev/null
|
|
|
|
# Adding user with sudo privilege
|
|
if [ -n "$username" ]; then
|
|
echo "Adding $username with root privilege."
|
|
useradd -m $username
|
|
usermod -aG wheel $username
|
|
|
|
groupadd -r audit
|
|
gpasswd -a $username audit
|
|
fi
|
|
EOF
|
|
|
|
# Setting user password.
|
|
[ -n "$username" ] && echo "Setting user password for ${username}." && echo -e "${user_password}\n${user_password}" | arch-chroot /mnt passwd "$username" &>/dev/null
|
|
|
|
# Giving wheel user sudo access.
|
|
sed -i 's/# \(%wheel ALL=(ALL\(:ALL\|\)) ALL\)/\1/g' /mnt/etc/sudoers
|
|
|
|
# Change audit logging group
|
|
echo "log_group = audit" >> /mnt/etc/audit/auditd.conf
|
|
|
|
# Enabling audit service.
|
|
systemctl enable auditd --root=/mnt &>/dev/null
|
|
|
|
# Enabling openssh server
|
|
systemctl enable sshd --root=/mnt &>/dev/null
|
|
|
|
# Enabling auto-trimming service.
|
|
systemctl enable fstrim.timer --root=/mnt &>/dev/null
|
|
|
|
# Enabling NetworkManager.
|
|
systemctl enable NetworkManager --root=/mnt &>/dev/null
|
|
|
|
# Enabling AppArmor.
|
|
echo "Enabling AppArmor."
|
|
systemctl enable apparmor --root=/mnt &>/dev/null
|
|
|
|
# Enabling Firewalld.
|
|
echo "Enabling Firewalld."
|
|
systemctl enable firewalld --root=/mnt &>/dev/null
|
|
|
|
# Enabling Reflector timer.
|
|
echo "Enabling Reflector."
|
|
systemctl enable reflector.timer --root=/mnt &>/dev/null
|
|
|
|
# Enabling systemd-oomd.
|
|
echo "Enabling systemd-oomd."
|
|
systemctl enable systemd-oomd --root=/mnt &>/dev/null
|
|
|
|
# Disabling systemd-timesyncd
|
|
systemctl disable systemd-timesyncd --root=/mnt &>/dev/null
|
|
|
|
# Enabling chronyd
|
|
systemctl enable chronyd --root=/mnt &>/dev/null
|
|
|
|
# Enabling Snapper automatic snapshots.
|
|
echo "Enabling Snapper and automatic snapshots entries."
|
|
systemctl enable snapper-timeline.timer --root=/mnt &>/dev/null
|
|
systemctl enable snapper-cleanup.timer --root=/mnt &>/dev/null
|
|
systemctl enable grub-btrfs.path --root=/mnt &>/dev/null
|
|
|
|
# Setting umask to 077.
|
|
sed -i 's/022/077/g' /mnt/etc/profile
|
|
echo "" >> /mnt/etc/bash.bashrc
|
|
echo "umask 077" >> /mnt/etc/bash.bashrc
|
|
|
|
# Finishing up
|
|
echo "Done, you may now wish to reboot (further changes can be done by chrooting into /mnt)."
|
|
exit |