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nullpoint/post-install.sh
Dominik Roth b582bb9574 better ascii logos
2025-08-25 11:07:39 +02:00

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#!/bin/bash
set -euo pipefail
BANNER=$(cat << "EOF"
__.,,.__
:^7J5GB##&&##GPY?~:
^75B&@@@@@@&&&@@@@@@@#GJ~:
5&@@@&B5?7~^^^^^~!7YP#@@@@#!
Y##P7^ :~JB#B!
:: :
7PP?: :^~!!~^: :?PP7
:B@@B: !5B&@@@@&B5! :#@@B:
:!!: ^G@@@&BPPB@@@@G^ :!!:
:B@@@5^ ^5@@@B:
:7J7: !@@@# :&@@@~ :?J7:
J@@@5 :#@@@Y: :Y@@@B: 5@@@J
!@@@&^ ~B@@@&G55G&@@@B~ ~&@@@~
5@@@G: :7P#@@@@@@#P7: :B@@@Y
:P@@@B~ :~!77!~: ~B@@@P
Y@@@&Y^ ^5@@@@J
!G@@@&P7^ ^7P&@@@G~
!P&@@@&B? :: ?B&@@@&P!
^75#&&Y :P&&5: 5&&B57^
:^^ :P&&5: ^^:
^^
[nullpoint]
EOF
)
TANG_SERVERS=(
# "https://tang1.example.com your-thumbprint-1"
# "https://tang2.example.com your-thumbprint-2"
)
TPM_ENABLED=true
TPM_PCR_BANK="sha256"
TPM_PCR_IDS="0,1,2,3,4,5,6,7,8"
ALMA_USER="null"
ENABLE_MOTD=true
# REQUIRED: Set your SSH public key here - installation will fail without it!
SSH_KEY="ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOkoTn2NreAXMriOUqzyj3YoFW6jMo9B5B+3R5k8yrMi dodox@dodox-ProArt"
########################################################
# Config End
########################################################
set -euo pipefail
echo -e "\n$BANNER"
echo -e "\n[+] Starting post-installation configuration..."
# Check for SSH key
if [ -z "${SSH_KEY:-}" ]; then
echo "ERROR: No SSH key configured!"
echo "You must set SSH_KEY variable at the top of this script."
exit 1
fi
# Check for TPM
echo "[+] Checking for TPM..."
if [ ! -d "/sys/class/tpm/tpm0" ]; then
echo "WARNING: No TPM detected!"
TPM_ENABLED=false
else
echo "TPM detected."
TPM_ENABLED=true
fi
# Upgrade system packages first
echo "[+] Upgrading system packages..."
dnf upgrade -y || echo "WARNING: System upgrade failed"
# Install basic packages
echo "[+] Installing basic packages..."
dnf install -y epel-release || exit 1
dnf config-manager --set-enabled crb || exit 1
dnf install -y zsh git wget curl || exit 1
# Create user and add SSH key
echo "[+] Creating user ${ALMA_USER}..."
useradd -m -G wheel -s /bin/zsh ${ALMA_USER} || exit 1
mkdir -p /home/${ALMA_USER}/.ssh
echo "${SSH_KEY}" > /home/${ALMA_USER}/.ssh/authorized_keys
chmod 700 /home/${ALMA_USER}/.ssh
chmod 600 /home/${ALMA_USER}/.ssh/authorized_keys
chown -R ${ALMA_USER}:${ALMA_USER} /home/${ALMA_USER}/.ssh
# Configure passwordless sudo
echo "[+] Configuring passwordless sudo for ${ALMA_USER}..."
echo "${ALMA_USER} ALL=(ALL) NOPASSWD: ALL" > /etc/sudoers.d/99-${ALMA_USER}
chmod 440 /etc/sudoers.d/99-${ALMA_USER}
# Setup terminal environment for both user and root
echo "[+] Setting up terminal environment for ${ALMA_USER} and root..."
for user_account in "${ALMA_USER}" "root"; do
echo " - Setting up $user_account..."
if [ "$user_account" = "root" ]; then
home_dir="/root"
user_prefix=""
else
home_dir="/home/${user_account}"
user_prefix="su - ${user_account} -c"
fi
# Install oh-my-zsh
if [ "$user_account" = "root" ]; then
export RUNZSH=no CHSH=no KEEP_ZSHRC=yes && bash -c "$(wget -O- https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh)" 2>/dev/null || echo "WARNING: $user_account oh-my-zsh installation failed"
else
su - ${user_account} -c 'export RUNZSH=no CHSH=no KEEP_ZSHRC=yes && bash -c "$(wget -O- https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh)"' 2>/dev/null || echo "WARNING: $user_account oh-my-zsh installation failed"
fi
# Install powerlevel10k
if [ "$user_account" = "root" ]; then
git clone --depth=1 https://github.com/romkatv/powerlevel10k.git ${home_dir}/.oh-my-zsh/custom/themes/powerlevel10k 2>/dev/null || echo "WARNING: $user_account powerlevel10k installation failed"
else
su - ${user_account} -c 'git clone --depth=1 https://github.com/romkatv/powerlevel10k.git ~/.oh-my-zsh/custom/themes/powerlevel10k' 2>/dev/null || echo "WARNING: $user_account powerlevel10k installation failed"
fi
# Install dotfiles
if [ "$user_account" = "root" ]; then
cd ${home_dir} &&
git clone https://git.dominik-roth.eu/dodox/nullpoint.git /tmp/nullpoint-dotfiles-${user_account} &&
cd /tmp/nullpoint-dotfiles-${user_account}/dotfiles &&
for file in .*; do
if [ -f "$file" ] && [ "$file" != "." ] && [ "$file" != ".." ]; then
cp "$file" ${home_dir}/ 2>/dev/null || true
fi
done &&
cd ${home_dir} && rm -rf /tmp/nullpoint-dotfiles-${user_account} || echo "WARNING: $user_account dotfiles installation failed"
else
su - ${user_account} -c "
cd &&
git clone https://git.dominik-roth.eu/dodox/nullpoint.git /tmp/nullpoint-dotfiles-${user_account} &&
cd /tmp/nullpoint-dotfiles-${user_account}/dotfiles &&
for file in .*; do
if [ -f \"\$file\" ] && [ \"\$file\" != \".\" ] && [ \"\$file\" != \"..\" ]; then
cp \"\$file\" ~/ 2>/dev/null || true
fi
done &&
cd && rm -rf /tmp/nullpoint-dotfiles-${user_account}
" || echo "WARNING: $user_account dotfiles installation failed"
fi
# Set zsh as default shell
if [ "$user_account" = "root" ]; then
sed -i 's|^root:.*:/bin/bash$|root:x:0:0:root:/root:/bin/zsh|' /etc/passwd
else
sed -i "s|^${user_account}:.*:/bin/bash$|${user_account}:x:$(id -u ${user_account}):$(id -g ${user_account})::/home/${user_account}:/bin/zsh|" /etc/passwd
fi
done
# Set up MOTD
if [ "$ENABLE_MOTD" = true ]; then
echo "[+] Setting up MOTD..."
cat > /etc/motd << MOTD
$BANNER
MOTD
fi
# Install additional packages
echo "[+] Installing additional packages..."
dnf install -y \
clevis clevis-luks tpm2-tools tpm2-tss \
tmux neovim python3-pip python3.13 python3.13-pip \
tree gcc make autoconf automake tar bzip2 \
bash-completion || exit 1
# Install dropbear for early boot SSH
echo "[+] Installing dropbear for early boot SSH..."
dnf install -y dropbear dracut-network || exit 1
# Install modern CLI tools
echo "[+] Installing lsd, bat, and fastfetch..."
# Try to install fastfetch from repos first
dnf install -y fastfetch || echo "fastfetch not available in repos, skipping"
# Create nullpoint logo file for fastfetch
echo "[+] Creating nullpoint logo file..."
cat > /etc/nullpoint-logo << 'EOF'
__.,,.__
:^7J5GB##&&##GPY?~:
^75B&@@@@@@&&&@@@@@@@#GJ~:
5&@@@&B5?7~^^^^^~!7YP#@@@@#!
Y##P7^ :~JB#B!
:: :
7PP?: :^~!!~^: :?PP7
:B@@B: !5B&@@@@&B5! :#@@B:
:!!: ^G@@@&BPPB@@@@G^ :!!:
:B@@@5^ ^5@@@B:
:7J7: !@@@# :&@@@~ :?J7:
J@@@5 :#@@@Y: :Y@@@B: 5@@@J
!@@@&^ ~B@@@&G55G&@@@B~ ~&@@@~
5@@@G: :7P#@@@@@@#P7: :B@@@Y
:P@@@B~ :~!77!~: ~B@@@P
Y@@@&Y^ ^5@@@@J
!G@@@&P7^ ^7P&@@@G~
!P&@@@&B? :: ?B&@@@&P!
^75#&&Y :P&&5: 5&&B57^
:^^ :P&&5: ^^:
^^
EOF
# Install user-specific tools for the user account
echo "[+] Installing user-specific tools for ${ALMA_USER}..."
su - ${ALMA_USER} -c 'curl -fsSL https://claude.ai/install.sh | bash' || echo "WARNING: Claude Code installation failed"
su - ${ALMA_USER} -c 'python3.13 -m pip install --user bpytop' || echo "WARNING: bpytop installation failed"
# Install Docker from official repository
echo "[+] Installing Docker..."
dnf config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo || echo "WARNING: Docker repo setup failed"
dnf install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin || echo "WARNING: Docker installation failed"
systemctl enable docker || echo "WARNING: Docker enable failed"
usermod -aG docker ${ALMA_USER} || echo "WARNING: Adding user to docker group failed"
# Install using fixed versions that should work
LSD_VERSION="1.0.0"
BAT_VERSION="0.24.0"
# Download and install lsd
if curl -sL "https://github.com/lsd-rs/lsd/releases/download/v${LSD_VERSION}/lsd-v${LSD_VERSION}-x86_64-unknown-linux-musl.tar.gz" | tar xz -C /tmp; then
mv /tmp/lsd-*/lsd /usr/local/bin/ 2>/dev/null || true
chmod +x /usr/local/bin/lsd 2>/dev/null || true
fi
# Download and install bat
if curl -sL "https://github.com/sharkdp/bat/releases/download/v${BAT_VERSION}/bat-v${BAT_VERSION}-x86_64-unknown-linux-musl.tar.gz" | tar xz -C /tmp; then
mv /tmp/bat-*/bat /usr/local/bin/ 2>/dev/null || true
chmod +x /usr/local/bin/bat 2>/dev/null || true
fi
# Create batman script for fancy man pages
cat > /usr/local/bin/batman << 'BATMAN'
#!/bin/bash
export MANPAGER="sh -c 'col -bx | bat -l man -p'"
export MANROFFOPT="-c"
man "$@"
BATMAN
chmod +x /usr/local/bin/batman
# Create .tmp directory for user
mkdir -p /home/${ALMA_USER}/.tmp
chown ${ALMA_USER}:${ALMA_USER} /home/${ALMA_USER}/.tmp
# Configure Clevis for automatic unlock
if [ ${#TANG_SERVERS[@]} -gt 0 ] || [ "$TPM_ENABLED" = true ]; then
echo "[+] Configuring Clevis for automatic unlock..."
# Find LUKS devices
LUKS_DEVICES=$(lsblk -o NAME,FSTYPE -nr | grep crypto_LUKS | cut -d' ' -f1)
for device in $LUKS_DEVICES; do
DEVICE_PATH="/dev/${device}"
echo "Configuring Clevis for ${DEVICE_PATH}..."
if [ "$TPM_ENABLED" = true ] && [ ${#TANG_SERVERS[@]} -eq 0 ]; then
# TPM only
clevis luks bind -d "$DEVICE_PATH" tpm2 "{\"pcr_bank\":\"$TPM_PCR_BANK\",\"pcr_ids\":\"$TPM_PCR_IDS\"}"
elif [ "$TPM_ENABLED" = false ] && [ ${#TANG_SERVERS[@]} -gt 0 ]; then
# Tang only
for server in "${TANG_SERVERS[@]}"; do
read -r url thumbprint <<< "$server"
clevis luks bind -d "$DEVICE_PATH" tang "{\"url\":\"$url\",\"thp\":\"$thumbprint\"}"
done
elif [ "$TPM_ENABLED" = true ] && [ ${#TANG_SERVERS[@]} -gt 0 ]; then
# Both TPM and Tang (require both)
CONFIG="{\"t\":2,\"pins\":{"
CONFIG+="\"tpm2\":{\"pcr_bank\":\"$TPM_PCR_BANK\",\"pcr_ids\":\"$TPM_PCR_IDS\"},"
CONFIG+="\"tang\":{\"t\":1,\"tang\":["
for server in "${TANG_SERVERS[@]}"; do
read -r url thumbprint <<< "$server"
CONFIG+="{\"url\":\"$url\",\"thp\":\"$thumbprint\"},"
done
CONFIG="${CONFIG%,}]}}}"
clevis luks bind -d "$DEVICE_PATH" sss "$CONFIG"
fi
done
fi
# Enable Clevis for early boot (only needed for AlmaLinux < 8.7)
echo "[+] Configuring Clevis for early boot..."
OS_VERSION=$(cat /etc/redhat-release | grep -oE '[0-9]+\.[0-9]+' | head -1)
if [[ "$(echo "$OS_VERSION < 8.7" | bc)" -eq 1 ]]; then
echo " - Enabling clevis-luks-askpass.path for AlmaLinux $OS_VERSION"
systemctl enable clevis-luks-askpass.path || true
else
echo " - AlmaLinux $OS_VERSION: clevis-luks-askpass.path not needed"
fi
# Configure dropbear for remote unlock
echo "[+] Configuring dropbear SSH for remote unlock..."
# Create custom dracut module for dropbear SSH
mkdir -p /usr/lib/dracut/modules.d/60dropbear-ssh
# Create the module setup script
cat > /usr/lib/dracut/modules.d/60dropbear-ssh/module-setup.sh << 'EOF'
#!/bin/bash
check() {
require_binaries dropbear dbclient dropbearkey dropbearconvert || return 1
return 0
}
depends() {
echo network
}
install() {
inst_multiple dropbear dbclient dropbearkey dropbearconvert
# Create directories
inst_dir /etc/dropbear
inst_dir /var/log
inst_dir /root/.ssh
# Copy authorized keys if they exist
if [ -f /etc/dropbear/authorized_keys ]; then
inst /etc/dropbear/authorized_keys /root/.ssh/authorized_keys
fi
# Install ED25519 host key only
keyfile="/etc/dropbear/dropbear_ed25519_host_key"
if [ ! -f "$keyfile" ]; then
dropbearkey -t ed25519 -f "$keyfile" 2>/dev/null
fi
[ -f "$keyfile" ] && inst "$keyfile"
# Install the service
inst_simple "$moddir/dropbear.service" /etc/systemd/system/dropbear.service
systemctl -q --root "$initdir" enable dropbear.service
# Install unlock helper
inst_simple "$moddir/unlock-luks.sh" /usr/bin/unlock-luks
chmod 755 "$initdir/usr/bin/unlock-luks"
}
EOF
# Create systemd service for dropbear
cat > /usr/lib/dracut/modules.d/60dropbear-ssh/dropbear.service << 'EOF'
[Unit]
Description=Dropbear SSH Server
After=network-online.target
Wants=network-online.target
[Service]
Type=forking
ExecStart=/usr/sbin/dropbear -R -E -p 22
ExecReload=/bin/kill -HUP $MAINPID
KillMode=process
Restart=on-failure
[Install]
WantedBy=sysinit.target
EOF
# Create unlock helper script
cat > /usr/lib/dracut/modules.d/60dropbear-ssh/unlock-luks.sh << 'EOF'
#!/bin/bash
echo "=== LUKS Remote Unlock Helper ==="
echo ""
echo "Checking for encrypted devices..."
# Show block devices if available
if command -v lsblk >/dev/null 2>&1; then
echo "Block devices:"
lsblk -o NAME,SIZE,TYPE,FSTYPE 2>/dev/null || echo " (lsblk not available)"
else
echo "Block devices: (listing /dev/sd* and /dev/md*)"
ls -la /dev/sd* /dev/md* 2>/dev/null || echo " No standard devices found"
fi
echo ""
echo "Encrypted devices status:"
# Check for LUKS devices waiting to be unlocked
for dev in /dev/mapper/luks-*; do
if [ -e "$dev" ]; then
echo " Found: $dev"
fi
done
# Check systemd-ask-password files directly
if [ -d /run/systemd/ask-password ]; then
echo ""
echo "Password prompts waiting:"
ls -la /run/systemd/ask-password/ 2>/dev/null
fi
echo ""
echo "Starting unlock process..."
echo "Enter your LUKS passphrase when prompted:"
echo ""
# Run the password agent
if command -v systemd-tty-ask-password-agent >/dev/null 2>&1; then
systemd-tty-ask-password-agent
else
echo "ERROR: systemd-tty-ask-password-agent not found!"
echo "Try running: /lib/systemd/systemd-tty-ask-password-agent"
fi
EOF
chmod +x /usr/lib/dracut/modules.d/60dropbear-ssh/*.sh
# Setup dropbear authorized keys
mkdir -p /etc/dropbear
echo "${SSH_KEY}" > /etc/dropbear/authorized_keys
chmod 600 /etc/dropbear/authorized_keys
# Generate ED25519 host key only (most secure)
echo "[+] Generating ED25519 SSH host key..."
# Use system SSH key if available, otherwise generate dropbear key
openssh_key="/etc/ssh/ssh_host_ed25519_key"
dropbear_key="/etc/dropbear/dropbear_ed25519_host_key"
if [ -f "$openssh_key" ] && command -v dropbearconvert >/dev/null 2>&1; then
echo " Converting existing OpenSSH ED25519 key to dropbear format..."
dropbearconvert openssh dropbear "$openssh_key" "$dropbear_key" 2>/dev/null || {
echo " Conversion failed, generating new dropbear key..."
dropbearkey -t ed25519 -f "$dropbear_key" | grep -v "Generating" || true
}
elif [ ! -f "$dropbear_key" ]; then
echo " Generating new ED25519 key..."
dropbearkey -t ed25519 -f "$dropbear_key" | grep -v "Generating" || true
# Also generate OpenSSH format to prevent key mismatch after boot
if command -v ssh-keygen >/dev/null 2>&1; then
echo " Generating matching OpenSSH key..."
mkdir -p /etc/ssh
# Extract public key and generate OpenSSH private key
dropbearkey -y -f "$dropbear_key" | grep "^ssh-" > "${openssh_key}.pub"
# Note: Direct conversion from dropbear to openssh private key requires dropbearconvert
# For now, we'll have different keys but document the solution
fi
fi
# Display SHA256 fingerprint
if command -v ssh-keygen >/dev/null 2>&1; then
fingerprint=$(dropbearkey -y -f "$dropbear_key" | ssh-keygen -lf - -E sha256 2>/dev/null | awk '{print $2}')
if [ -n "$fingerprint" ]; then
echo " SHA256 fingerprint: $fingerprint"
echo " Note: This is the initramfs (rescue) SSH fingerprint."
echo " The normal system SSH may have a different fingerprint."
fi
fi
# Configure dracut
cat > /etc/dracut.conf.d/60-dropbear-ssh.conf << 'EOF'
# Enable network and dropbear SSH
add_dracutmodules+=" network dropbear-ssh "
# Network configuration
kernel_cmdline="rd.neednet=1"
EOF
# Regenerate initramfs
echo "[+] Regenerating initramfs..."
dracut -f --regenerate-all
# Enable required services
echo "[+] Enabling services..."
# systemctl enable stratisd # Not needed without Stratis
systemctl enable sshd
# Secure SSH configuration
echo "[+] Securing SSH..."
{
# Disable root login
sed -i 's/^#*PermitRootLogin.*/PermitRootLogin no/' /etc/ssh/sshd_config
# Only allow SSH key authentication
sed -i 's/^#*PasswordAuthentication.*/PasswordAuthentication no/' /etc/ssh/sshd_config
sed -i 's/^#*ChallengeResponseAuthentication.*/ChallengeResponseAuthentication no/' /etc/ssh/sshd_config
sed -i 's/^#*UsePAM.*/UsePAM no/' /etc/ssh/sshd_config
# Only allow specific user
echo "AllowUsers ${ALMA_USER}" >> /etc/ssh/sshd_config
echo " - Root login disabled"
echo " - Password authentication disabled"
echo " - Only user '${ALMA_USER}' allowed"
}
# Set SELinux to enforcing
echo "[+] Setting SELinux to enforcing..."
sed -i 's/^SELINUX=.*/SELINUX=enforcing/' /etc/selinux/config
echo "✅ Post-installation complete!"
echo ""
# Display SSH host key fingerprints
echo "SSH Host Key Fingerprints:"
ed25519_fp=""
dropbear_fp=""
if [ -f "/etc/ssh/ssh_host_ed25519_key.pub" ] && command -v ssh-keygen >/dev/null 2>&1; then
ed25519_fp=$(ssh-keygen -lf /etc/ssh/ssh_host_ed25519_key.pub -E sha256 2>/dev/null | awk '{print $2}')
fi
if [ -f "/etc/dropbear/dropbear_ed25519_host_key" ] && command -v ssh-keygen >/dev/null 2>&1; then
dropbear_fp=$(dropbearkey -y -f /etc/dropbear/dropbear_ed25519_host_key 2>/dev/null | ssh-keygen -lf - -E sha256 2>/dev/null | awk '{print $2}')
fi
if [ -n "$ed25519_fp" ] && [ -n "$dropbear_fp" ] && [ "$ed25519_fp" = "$dropbear_fp" ]; then
echo " SSH (ED25519): $ed25519_fp (same for both rescue and normal)"
elif [ -n "$ed25519_fp" ] && [ -n "$dropbear_fp" ]; then
echo " Normal SSH (ED25519): $ed25519_fp"
echo " Rescue SSH (ED25519): $dropbear_fp"
elif [ -n "$ed25519_fp" ]; then
echo " Normal SSH (ED25519): $ed25519_fp"
elif [ -n "$dropbear_fp" ]; then
echo " Rescue SSH (ED25519): $dropbear_fp"
else
echo " No ED25519 keys found"
fi
echo ""
echo "IMPORTANT: Save the LUKS passphrase from install.conf securely!"
echo ""
echo "Next Steps:"
echo "1. Manually reboot the system when ready"
echo "2. SSH root@<server-ip> → run 'unlock-luks' → enter passphrase"
echo "3. System finalizes setup and reboots automatically"
echo "4. SSH root@<server-ip> → run 'unlock-luks' → enter passphrase again"
echo "5. System is ready → SSH as user '${ALMA_USER}'"
echo ""
echo "Future boots: Only one unlock needed (or automatic if Tang/Clevis configured)"
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