mirror of
https://github.com/tommytran732/Arch-Setup-Script
synced 2024-11-09 04:01:33 -05:00
249 lines
8.6 KiB
Bash
249 lines
8.6 KiB
Bash
#!/usr/bin/env -S bash -e
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# Cleaning the TTY.
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clear
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# Selecting the kernel flavor to install.
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kernel_selector () {
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echo "List of kernels:"
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echo "1) Stable — Vanilla Linux kernel and modules, with a few patches applied."
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echo "2) Hardened — A security-focused Linux kernel."
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echo "3) Longterm — Long-term support (LTS) Linux kernel and modules."
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echo "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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echo "$choice will be installed"
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case $choice in
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1 ) kernel=linux
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;;
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2 ) kernel=linux-hardened
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;;
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3 ) kernel=linux-lts
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;;
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4 ) kernel=linux-zen
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;;
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* ) echo "You did not enter a valid selection."
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kernel_selector
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esac
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}
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# Checking the microcode to install.
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CPU=$(grep vendor_id /proc/cpuinfo)
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if [[ $CPU == *"AuthenticAMD"* ]]
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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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# Selecting the target for the installation.
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PS3="Select the disk where Arch Linux is going to be installed: "
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select ENTRY in $(lsblk -dpnoNAME|grep -P "/dev/sd|nvme");
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do
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DISK=$ENTRY
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echo "Installing Arch Linux on $DISK."
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break
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done
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# Deleting old partition scheme.
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read -r -p "This will delete the current partition table on $DISK. Do you agree [y/N]? " response
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response=${response,,}
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if [[ "$response" =~ ^(yes|y)$ ]]
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then
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wipefs -af $DISK &>/dev/null
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sgdisk -Zo $DISK &>/dev/null
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else
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echo "Quitting."
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exit
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fi
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# Creating a new partition scheme.
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echo "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 101MiB \
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mkpart cryptroot 101MiB 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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echo "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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echo "Formatting the EFI Partition as FAT32."
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mkfs.fat -F 32 $ESP &>/dev/null
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# Creating a LUKS Container for the root partition.
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echo "Creating LUKS Container for the root partition."
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cryptsetup --type luks1 luksFormat $cryptroot
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echo "Opening the newly created LUKS Container."
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cryptsetup open $cryptroot cryptroot
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BTRFS="/dev/mapper/cryptroot"
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# Formatting the LUKS Container as BTRFS.
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echo "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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echo "Creating BTRFS subvolumes."
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btrfs subvolume create /mnt/@ &>/dev/null
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btrfs subvolume create /mnt/@/.snapshots &>/dev/null
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mkdir /mnt/@/.snapshots/0 &>/dev/null
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btrfs subvolume create /mnt/@/.snapshots/1/snapshot &>/dev/null
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btrfs subvolume create /mnt/@/boot &>/dev/null
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btrfs subvolume create /mnt/@/home &>/dev/null
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btrfs subvolume create /mnt/@/root &>/dev/null
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btrfs subvolume create /mnt/@/var_log &>/dev/null
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btrfs subvolume create /mnt/@/var_lib_gdm &>/dev/null
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chattr +C /mnt/@/var_log
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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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# 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:15 $BTRFS /mnt
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mkdir -p /mnt/{boot,root,home,.snapshots,/var/}
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mount -o ssd,noatime,space_cache,compress=zstd:15,subvol=@/boot $BTRFS /mnt/boot
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mount -o ssd,noatime,space_cache,compress=zstd:15,subvol=@/root $BTRFS /mnt/root
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mount -o ssd,noatime,space_cache.compress=zstd:15,subvol=@/home $BTRFS /mnt/home
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mount -o ssd,noatime,space_cache,compress=zstd:15,subvol=@/.snapshots $BTRFS /mnt/.snapshots
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mount -o ssd,noatime,space_cache,compress=zstd:15,nodatacow,subvol=@/var_log $BTRFS /mnt/var/log
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mount -o ssd,noatime,space_cache,compress=zstd:15,subvol=@/var_lib_gdm $BTRFS /mnt/var/lib/gdm
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mkdir -p /mnt/boot/efi
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mount $ESP /mnt/boot/efi
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kernel_selector
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# Pacstrap (setting up a base sytem onto the new root).
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echo "Installing the base system (it may take a while)."
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pacstrap /mnt base base-devel ${kernel} ${microcode} linux-firmware grub grub-btrfs snapper efibootmgr sudo networkmanager apparmor pipewire nano gnome-shell gdm gnome-control-center gnome-terminal gnome-software gnome-tweaks nautilus flatpak xdg-user-dirs firewalld
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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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# Setting hostname.
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read -r -p "Please enter the hostname: " hostname
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echo $hostname > /mnt/etc/hostname
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# Setting up locales.
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read -r -p "Please insert the locale you use in this format (xx_XX): " locale
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echo "$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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# 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 $hostname
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EOF
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# Configuring /etc/mkinitcpio.conf
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echo "Configuring /etc/mkinitcpio for ZSTD compression and LUKS hook."
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sed -i -e 's,#COMPRESSION="zstd",COMPRESSION="zstd",g' /mnt/etc/mkinitcpio.conf
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sed -i -e 's,modconf block filesystems keyboard,keyboard keymap modconf block encrypt filesystems,g' /mnt/etc/mkinitcpio.conf
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# Enabling LUKS in GRUB and setting the UUID of the LUKS container.
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UUID=$(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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sed -i -e "s,quiet,quiet cryptdevice=UUID=$UUID:cryptroot root=$BTRFS,g" /mnt/etc/default/grub
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sed -i -e "s#root=/dev/mapper/cryptroot#root=/dev/mapper/cryptroot lsm=lockdown,yama,apparmor,bpf#g" /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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# Adding keyfile to the initramfs to avoid double password.
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dd bs=512 count=4 if=/dev/random of=/mnt/.root.key iflag=fullblock &>/dev/null
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chmod 000 /mnt/.root.key &>/dev/null
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cryptsetup -v luksAddKey /dev/disk/by-partlabel/cryptroot /mnt/.root.key
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#I also remove the quiet flag here, since not having any sort of output is a pain
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sed -i -e "s,quiet,cryptdevice=UUID=$UUID:cryptroot root=$BTRFS cryptkey=rootfs:/.root.key,g" /mnt/etc/default/grub
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sed -i 's#FILES=()#FILES=(/.root.key)#g' /mnt/etc/mkinitcpio.conf
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# Security kernel settings.
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echo "kernel.kptr_restrict = 2" > /mnt/etc/sysctl.d/51-kptr-restrict.conf
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echo "kernel.kexec_load_disabled = 1" > /mnt/etc/sysctl.d/51-kexec-restrict.conf
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cat << EOF >> /mnt/etc/sysctl.d/10-security.conf
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fs.protected_hardlinks = 1
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fs.protected_symlinks = 1
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net.core.bpf_jit_harden = 2
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kernel.yama.ptrace_scope = 3
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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/$(curl -s http://ip-api.com/line?fields=timezone) /etc/localtime &>/dev/null
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# Setting up clock.
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hwclock --systohc
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# Generating locales.
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echo "Generating locales."
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locale-gen &>/dev/null
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# Generating a new initramfs.
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echo "Creating a new initramfs."
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chmod 600 /boot/initramfs-linux* &>/dev/null
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mkinitcpio -P &>/dev/null
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# Snapper configuration
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umount /.snapshots
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rm -r /.snapshots
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snapper --no-dbus -c root create-config /
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btrfs subvolume delete /.snapshots
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mkdir /.snapshots
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mount -a
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chmod 750 /.snapshots
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systemctl enable grub-btrfs.path
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# Installing GRUB.
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echo "Installing GRUB on /boot."
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grub-install --target=x86_64-efi --efi-directory=/boot/efi --bootloader-id=GRUB &>/dev/null
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sed -i 's#"rootflags=subvol=${rootsubvol}##g' /etc/grub.d/10_linux
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sed -i 's#"rootflags=subvol=${rootsubvol}##g' /etc/grub.d/20_linux_xen
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# Creating grub config file.
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echo "Creating GRUB config file."
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grub-mkconfig -o /boot/grub/grub.cfg &>/dev/null
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EOF
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# Setting root password.
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echo "Setting root password."
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arch-chroot /mnt /bin/passwd
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# Enabling auto-trimming service.
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echo "Enabling auto-trimming."
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systemctl enable fstrim.timer --root=/mnt &>/dev/null
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# Enabling NetworkManager service.
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echo "Enabling NetworkManager."
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systemctl enable NetworkManager --root=/mnt &>/dev/null
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# Enabling GDM
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systemctl enable gdm --root=/mnt &>/dev/null
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# Enabling AppArmor
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systemctl enable apparmor --root=/mnt &>/dev/null
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# Enabling Firewalld
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systemctl enable firewalld --root=/mnt &>/dev/null
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# Setting umask to 077
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sed -i 's/022/077/g' /mnt/etc/profile
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echo "" >> /mnt/etc/bash.bashrc
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echo "umask 077" >> /mnt/etc/bash.bashrc
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#Blacklist Firewire SBP2
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echo "blacklist firewire-sbp2" | sudo tee /mnt/etc/modprobe.d/blacklist.conf
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echo "Done, you may now wish to reboot (further changes can be done by chrooting into /mnt)."
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exit
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