fix ARMBIAN_HOME unbound variable, retry_or_abort quoting, and hardcoded path in sed

hub/onboard-spoke.sh

@@ -0,0 +1,124 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+RCLONE_CONF="${HOME}/.config/rclone/rclone.conf"
+SSH_DIR="${HOME}/.ssh"
+
+if [ "$(id -u)" -eq 0 ]; then
+    echo -e "\033[0;31m[WARNING]\033[0m Running as root — keys will be written to /root/.ssh. Run as armbian instead."
+    exit 1
+fi
+mkdir -p "$SSH_DIR"
+touch "$SSH_DIR/known_hosts"
+chmod 700 "$SSH_DIR"
+chmod 600 "$SSH_DIR/known_hosts"
+
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+CYAN='\033[0;36m'
+NC='\033[0m'
+
+retry_or_abort() {
+    local test_cmd="$1"
+    local fail_msg="$2"
+    while true; do
+        if eval "$test_cmd" 2>/dev/null; then
+            return 0
+        fi
+        echo ""
+        warn "$fail_msg"
+        echo -e "  ${YELLOW}[R]${NC} Retry   ${RED}[A]${NC} Abort"
+        read -rp "Choice: " CHOICE
+        case "${CHOICE,,}" in
+            r) info "Retrying..." ;;
+            a) die "Aborted." ;;
+            *) warn "Press R to retry or A to abort." ;;
+        esac
+    done
+}
+
+info()   { echo -e "${GREEN}[+]${NC} $*"; }
+warn()   { echo -e "${YELLOW}[!]${NC} $*"; }
+die()    { echo -e "${RED}[ERROR]${NC} $*" >&2; exit 1; }
+header() { echo -e "\n${CYAN}══════════════════════════════════════════${NC}"; echo -e "${CYAN}  $*${NC}"; echo -e "${CYAN}══════════════════════════════════════════${NC}"; }
+
+header "TinyBoard Hub — Onboard New Spoke"
+
+read -rp "Spoke name (e.g. rocky): " SPOKE_NAME
+[ -n "$SPOKE_NAME" ] || die "Spoke name cannot be empty"
+
+read -rp "Tunnel port for $SPOKE_NAME: " TUNNEL_PORT
+[[ "$TUNNEL_PORT" =~ ^[0-9]+$ ]] || die "Invalid port"
+
+KEY_NAME="armbian-${SPOKE_NAME}-$(date +%Y%m)"
+KEY_PATH="$SSH_DIR/$KEY_NAME"
+
+command -v rclone >/dev/null || die "rclone is not installed"
+mkdir -p "$(dirname "$RCLONE_CONF")"
+
+header "Checking Tunnel"
+info "Scanning spoke host key..."
+KEYSCAN=$(ssh-keyscan -p "$TUNNEL_PORT" -H localhost 2>/dev/null)
+[ -n "$KEYSCAN" ] || die "Spoke not reachable on port $TUNNEL_PORT — is the tunnel up?"
+echo "$KEYSCAN" >> "$SSH_DIR/known_hosts"
+
+info "Verifying spoke is reachable on port $TUNNEL_PORT..."
+retry_or_abort \
+    "ssh -o BatchMode=yes -o ConnectTimeout=10 -p \"$TUNNEL_PORT\" armbian@localhost exit" \
+    "Spoke not reachable on port $TUNNEL_PORT. Make sure the tunnel is up."
+
+header "Generating Hub SSH Key"
+if [ -f "$KEY_PATH" ]; then
+    warn "Key $KEY_PATH already exists, skipping generation."
+else
+    ssh-keygen -t ed25519 -f "$KEY_PATH" -N ""
+    info "Key generated: $KEY_PATH"
+fi
+
+header "Copying Hub Key to Spoke"
+info "Running ssh-copy-id to armbian@localhost:$TUNNEL_PORT..."
+info "(You will be prompted for the armbian password on the spoke)"
+ssh-copy-id -i "$KEY_PATH.pub" -p "$TUNNEL_PORT" armbian@localhost
+info "Key copied."
+
+header "Testing Hub -> Spoke Key Auth"
+retry_or_abort \
+    "ssh -i \"$KEY_PATH\" -o BatchMode=yes -o ConnectTimeout=10 -p \"$TUNNEL_PORT\" armbian@localhost exit" \
+    "Key auth failed. Check authorized_keys on the spoke."
+info "Key auth to spoke successful."
+
+header "Adding rclone Remote"
+if grep -q "\[${SPOKE_NAME}-remote\]" "$RCLONE_CONF" 2>/dev/null; then
+    warn "Remote [${SPOKE_NAME}-remote] already exists in $RCLONE_CONF, skipping."
+else
+    cat >> "$RCLONE_CONF" <<EOF
+
+[${SPOKE_NAME}-remote]
+type = sftp
+host = localhost
+port = $TUNNEL_PORT
+key_file = $KEY_PATH
+shell_type = unix
+md5sum_command = md5sum
+sha1sum_command = sha1sum
+EOF
+    info "Remote [${SPOKE_NAME}-remote] added to $RCLONE_CONF."
+fi
+
+header "Testing rclone Connection"
+if rclone lsd "${SPOKE_NAME}-remote:" --config "$RCLONE_CONF" 2>/dev/null; then
+    info "rclone connection to $SPOKE_NAME successful."
+else
+    warn "rclone test failed. Check the remote config in $RCLONE_CONF."
+fi
+
+header "Onboarding Complete"
+echo -e "  Spoke:       ${GREEN}$SPOKE_NAME${NC}"
+echo -e "  Port:        ${GREEN}$TUNNEL_PORT${NC}"
+echo -e "  Hub key:     ${GREEN}$KEY_PATH${NC}"
+echo -e "  rclone:      ${GREEN}${SPOKE_NAME}-remote${NC}"
+echo ""
+echo -e "${YELLOW}To mount this spoke:${NC}"
+echo "  RCLONE_REMOTE=${SPOKE_NAME}-remote hubspoke-helper.sh hub start"
+echo ""

hub/setup-hub.sh

@@ -0,0 +1,198 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+CYAN='\033[0;36m'
+NC='\033[0m'
+
+info()   { echo -e "${GREEN}[+]${NC} $*"; }
+warn()   { echo -e "${YELLOW}[!]${NC} $*"; }
+die()    { echo -e "${RED}[ERROR]${NC} $*" >&2; exit 1; }
+header() { echo -e "\n${CYAN}══════════════════════════════════════════${NC}"; echo -e "${CYAN}  $*${NC}"; echo -e "${CYAN}══════════════════════════════════════════${NC}"; }
+
+[ "$(id -u)" -eq 0 ] || die "Run as root"
+
+header "TinyBoard Hub Setup"
+
+read -rp "Hub username [armbian]: " HUB_USER
+HUB_USER="${HUB_USER:-armbian}"
+
+header "Detecting Package Manager"
+if command -v apt-get >/dev/null 2>&1; then
+    PKG_MANAGER="apt"
+    PKG_INSTALL="apt-get install -y -q"
+    OPENSSH_PKG="openssh-server"
+    FUSE_PKG="fuse"
+    info "Detected: apt (Debian/Ubuntu)"
+    apt-get update -q
+elif command -v dnf >/dev/null 2>&1; then
+    PKG_MANAGER="dnf"
+    PKG_INSTALL="dnf install -y -q"
+    OPENSSH_PKG="openssh-server"
+    FUSE_PKG="fuse"
+    info "Detected: dnf (Fedora/RHEL/Alma/Rocky)"
+    dnf check-update -q || true
+elif command -v yum >/dev/null 2>&1; then
+    PKG_MANAGER="yum"
+    PKG_INSTALL="yum install -y -q"
+    OPENSSH_PKG="openssh-server"
+    FUSE_PKG="fuse"
+    info "Detected: yum (older RHEL/CentOS)"
+    yum check-update -q || true
+elif command -v pacman >/dev/null 2>&1; then
+    PKG_MANAGER="pacman"
+    PKG_INSTALL="pacman -S --noconfirm --quiet"
+    OPENSSH_PKG="openssh"
+    FUSE_PKG="fuse3"
+    info "Detected: pacman (Arch)"
+    pacman -Sy --quiet
+else
+    die "No supported package manager found (apt, dnf, yum, pacman)"
+fi
+
+header "Installing Packages"
+info "Installing curl if missing..."
+if ! command -v curl >/dev/null 2>&1; then
+    $PKG_INSTALL curl
+fi
+
+$PKG_INSTALL "$OPENSSH_PKG" "$FUSE_PKG" git
+
+if ! command -v rclone >/dev/null 2>&1; then
+    info "Installing rclone..."
+    if [ "$PKG_MANAGER" = "pacman" ]; then
+        $PKG_INSTALL rclone
+    else
+        curl -fsSL https://rclone.org/install.sh | bash
+    fi
+else
+    warn "rclone already installed, skipping."
+fi
+
+header "Armbian User Setup"
+if id "$HUB_USER" >/dev/null 2>&1; then
+    warn "User '$HUB_USER' already exists, skipping creation."
+else
+    info "Creating $HUB_USER user..."
+    groupadd -g 1000 "$HUB_USER" 2>/dev/null || true
+    useradd -m -u 1000 -g 1000 -s /bin/bash "$HUB_USER"
+
+    ADDED_TO_GROUP=false
+    if getent group sudo >/dev/null 2>&1; then
+        if usermod -aG sudo "$HUB_USER" 2>/dev/null; then
+            ADDED_TO_GROUP=true
+        fi
+    fi
+    if [ "$ADDED_TO_GROUP" = false ] && getent group wheel >/dev/null 2>&1; then
+        if usermod -aG wheel "$HUB_USER" 2>/dev/null; then
+            ADDED_TO_GROUP=true
+        fi
+    fi
+    if [ "$ADDED_TO_GROUP" = false ]; then
+        warn "Neither sudo nor wheel group found — $HUB_USER user has no sudo access."
+    fi
+
+    info "$HUB_USER user created."
+    echo ""
+    warn "Set a password for the $HUB_USER user:"
+    passwd "$HUB_USER"
+fi
+
+ARMBIAN_HOME="/home/$HUB_USER"
+SSH_DIR="$ARMBIAN_HOME/.ssh"
+mkdir -p "$SSH_DIR"
+touch "$SSH_DIR/authorized_keys"
+chown -R "$HUB_USER":"$HUB_USER" "$SSH_DIR"
+chmod 700 "$SSH_DIR"
+chmod 600 "$SSH_DIR/authorized_keys"
+
+header "SSH Server Configuration"
+SSHD_CONF="/etc/ssh/sshd_config"
+[ -f "$SSHD_CONF" ] || die "sshd_config not found at $SSHD_CONF"
+
+for DIRECTIVE in "GatewayPorts yes" "AllowTcpForwarding yes"; do
+    KEY="${DIRECTIVE%% *}"
+    if grep -q "^$KEY" "$SSHD_CONF"; then
+        sed -i "s/^$KEY.*/$DIRECTIVE/" "$SSHD_CONF"
+    else
+        echo "$DIRECTIVE" >> "$SSHD_CONF"
+    fi
+    info "$DIRECTIVE set."
+done
+
+if systemctl enable ssh 2>/dev/null; then
+    systemctl restart ssh
+elif systemctl enable sshd 2>/dev/null; then
+    systemctl restart sshd
+else
+    warn "Could not enable/restart SSH service — please start it manually."
+fi
+info "SSH server restarted."
+
+header "FUSE Configuration"
+FUSE_CONF="/etc/fuse.conf"
+if [ -f "$FUSE_CONF" ]; then
+    if grep -q "^#user_allow_other" "$FUSE_CONF"; then
+        sed -i 's/^#user_allow_other/user_allow_other/' "$FUSE_CONF"
+        info "user_allow_other enabled in $FUSE_CONF."
+    elif grep -q "^user_allow_other" "$FUSE_CONF"; then
+        warn "user_allow_other already enabled."
+    else
+        echo "user_allow_other" >> "$FUSE_CONF"
+        info "user_allow_other added to $FUSE_CONF."
+    fi
+else
+    echo "user_allow_other" > "$FUSE_CONF"
+    info "$FUSE_CONF created with user_allow_other."
+fi
+
+groupadd fuse 2>/dev/null || true
+usermod -aG fuse "$HUB_USER" 2>/dev/null || true
+info "$HUB_USER added to fuse group."
+
+header "Rclone Setup"
+RCLONE_CONF="$ARMBIAN_HOME/.config/rclone/rclone.conf"
+mkdir -p "$(dirname "$RCLONE_CONF")"
+chown -R "$HUB_USER":"$HUB_USER" "$ARMBIAN_HOME/.config"
+
+if [ ! -f "$RCLONE_CONF" ]; then
+    touch "$RCLONE_CONF"
+    chown "$HUB_USER":"$HUB_USER" "$RCLONE_CONF"
+    info "Empty rclone.conf created at $RCLONE_CONF."
+else
+    warn "rclone.conf already exists, skipping."
+fi
+
+header "Mount Point Setup"
+read -rp "Mount point for spoke filesystems [/mnt/hub]: " MOUNT_POINT
+MOUNT_POINT="${MOUNT_POINT:-/mnt/hub}"
+mkdir -p "$MOUNT_POINT"
+chown "$HUB_USER":"$HUB_USER" "$MOUNT_POINT"
+info "Mount point created at $MOUNT_POINT."
+
+header "Crontab Setup"
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+HELPER="$SCRIPT_DIR/../hubspoke-helper.sh"
+CRON_LINE="@reboot $HELPER hub start-background"
+EXISTING=$(crontab -u "$HUB_USER" -l 2>/dev/null || true)
+
+if echo "$EXISTING" | grep -qF "hub start-background"; then
+    warn "Crontab entry already exists, skipping."
+else
+    (echo "$EXISTING"; echo "$CRON_LINE") | crontab -u "$HUB_USER" -
+    info "Added @reboot crontab entry for rclone mount."
+fi
+
+header "Hub Setup Complete"
+echo -e "  Hub user:      ${GREEN}$HUB_USER${NC}"
+echo -e "  SSH config:    ${GREEN}GatewayPorts yes, AllowTcpForwarding yes${NC}"
+echo -e "  FUSE:          ${GREEN}user_allow_other enabled${NC}"
+echo -e "  rclone config: ${GREEN}$RCLONE_CONF${NC}"
+echo -e "  Mount point:   ${GREEN}$MOUNT_POINT${NC}"
+echo ""
+echo -e "${YELLOW}Next steps:${NC}"
+echo "  For each spoke that connects, run:"
+echo "    ./setup.sh  (choose option 2)"
+echo ""

setup-network.sh

@@ -0,0 +1,167 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+CYAN='\033[0;36m'
+NC='\033[0m'
+
+info()   { echo -e "${GREEN}[+]${NC} $*"; }
+warn()   { echo -e "${YELLOW}[!]${NC} $*"; }
+die()    { echo -e "${RED}[ERROR]${NC} $*" >&2; exit 1; }
+header() { echo -e "\n${CYAN}══════════════════════════════════════════${NC}"; echo -e "${CYAN}  $*${NC}"; echo -e "${CYAN}══════════════════════════════════════════${NC}"; }
+
+[ "$(id -u)" -eq 0 ] || die "Run as root"
+
+header "TinyBoard Network Setup"
+
+info "Available interfaces:"
+ip -o link show | awk -F': ' 'NR>1 {print "  " $2}'
+echo ""
+
+read -rp "Enter interface name to configure (e.g. wlan0, eth0, end0): " IFACE
+[ -n "$IFACE" ] || die "Interface name cannot be empty"
+ip link show "$IFACE" >/dev/null 2>&1 || die "Interface $IFACE not found"
+
+IS_WIFI=false
+if [[ "$IFACE" == wl* ]]; then
+    IS_WIFI=true
+    info "Wireless interface detected."
+else
+    info "Wired interface detected — skipping WiFi credential setup."
+fi
+
+CURRENT_IP=$(ip -o -4 addr show "$IFACE" 2>/dev/null | awk '{print $4}' | head -1)
+CURRENT_GW=$(ip route show default 2>/dev/null | awk '/default/ {print $3}' | head -1)
+
+echo ""
+info "Current IP:      ${CURRENT_IP:-none}"
+info "Current gateway: ${CURRENT_GW:-none}"
+echo ""
+
+read -rp "Set a static IP for this spoke? [Y/n]: " SET_STATIC
+SET_STATIC="${SET_STATIC:-y}"
+
+if [[ "${SET_STATIC,,}" != "y" ]]; then
+    info "Keeping DHCP. No changes made."
+    exit 0
+fi
+
+header "Static IP Configuration"
+
+read -rp "Enter static IP with prefix (e.g. 192.168.1.69/24): " STATIC_IP
+[ -n "$STATIC_IP" ] || die "IP address cannot be empty"
+
+DEFAULT_GW="${CURRENT_GW:-192.168.1.1}"
+read -rp "Gateway [${DEFAULT_GW}]: " GATEWAY
+GATEWAY="${GATEWAY:-$DEFAULT_GW}"
+
+read -rp "DNS servers (comma-separated) [${GATEWAY},8.8.8.8]: " DNS_INPUT
+DNS_INPUT="${DNS_INPUT:-${GATEWAY},8.8.8.8}"
+
+DNS_YAML=""
+IFS=',' read -ra DNS_LIST <<< "$DNS_INPUT"
+for DNS in "${DNS_LIST[@]}"; do
+    DNS=$(echo "$DNS" | tr -d ' ')
+    DNS_YAML="${DNS_YAML}          - ${DNS}\n"
+done
+
+info "Current netplan configs:"
+ls /etc/netplan/ | sed 's/^/  /'
+echo ""
+
+NETPLAN_FILE=$(ls /etc/netplan/*.yaml 2>/dev/null | head -1)
+read -rp "Netplan file to update [${NETPLAN_FILE}]: " INPUT_FILE
+NETPLAN_FILE="${INPUT_FILE:-$NETPLAN_FILE}"
+NETPLAN_FILE="${NETPLAN_FILE:-$(ls /etc/netplan/*.yaml 2>/dev/null | head -1)}"
+[ -n "$NETPLAN_FILE" ] || die "No netplan file specified"
+
+if $IS_WIFI; then
+    header "WiFi Credentials"
+    CURRENT_SSID=""
+    if [ -f "$NETPLAN_FILE" ]; then
+        CURRENT_SSID=$(grep -A1 'access-points:' "$NETPLAN_FILE" 2>/dev/null | tail -1 | tr -d ' "' | sed 's/:$//' || true)
+    fi
+
+    KEEP_WIFI="n"
+    if [ -n "$CURRENT_SSID" ]; then
+        warn "Existing WiFi config found for: $CURRENT_SSID"
+        read -rp "Keep existing WiFi credentials? [Y/n]: " KEEP_WIFI
+        KEEP_WIFI="${KEEP_WIFI:-y}"
+    fi
+
+    if [[ "${KEEP_WIFI,,}" != "y" ]]; then
+        read -rp "WiFi SSID: " WIFI_SSID
+        [ -n "$WIFI_SSID" ] || die "SSID cannot be empty"
+        read -rsp "WiFi password: " WIFI_PASS
+        echo ""
+        [ -n "$WIFI_PASS" ] || die "Password cannot be empty"
+    else
+        WIFI_SSID="$CURRENT_SSID"
+        WIFI_PASS=$(grep -A2 "\"${WIFI_SSID}\"" "$NETPLAN_FILE" 2>/dev/null | grep password | awk -F': ' '{print $2}' | tr -d '"' || true)
+    fi
+fi
+
+header "Writing Netplan Config"
+if [ -f "$NETPLAN_FILE" ]; then
+    cp "$NETPLAN_FILE" "${NETPLAN_FILE}.bak"
+    info "Backup saved to ${NETPLAN_FILE}.bak"
+fi
+
+if $IS_WIFI; then
+    cat > "$NETPLAN_FILE" <<NETEOF
+network:
+  version: 2
+  wifis:
+    ${IFACE}:
+      dhcp4: no
+      addresses:
+        - ${STATIC_IP}
+      routes:
+        - to: default
+          via: ${GATEWAY}
+      nameservers:
+        addresses:
+$(printf '%b' "$DNS_YAML")      access-points:
+        "${WIFI_SSID}":
+          password: "${WIFI_PASS}"
+NETEOF
+else
+    cat > "$NETPLAN_FILE" <<NETEOF
+network:
+  version: 2
+  ethernets:
+    ${IFACE}:
+      dhcp4: no
+      addresses:
+        - ${STATIC_IP}
+      routes:
+        - to: default
+          via: ${GATEWAY}
+      nameservers:
+        addresses:
+$(printf '%b' "$DNS_YAML")
+NETEOF
+fi
+
+info "Netplan config written to $NETPLAN_FILE"
+
+header "Applying Configuration"
+warn "Testing netplan config..."
+if netplan try --timeout 10 2>/dev/null; then
+    info "Netplan config applied successfully."
+else
+    warn "netplan try timed out or failed — applying anyway..."
+    netplan apply
+fi
+
+STATIC_ADDR="${STATIC_IP%%/*}"
+echo ""
+echo -e "${YELLOW}══════════════════════════════════════════${NC}"
+echo -e "${YELLOW}  Network reconfigured.${NC}"
+echo -e "${YELLOW}  If you are connected via SSH, your session${NC}"
+echo -e "${YELLOW}  may drop. Reconnect to: ${STATIC_ADDR}${NC}"
+echo -e "${YELLOW}  Then run: ./setup.sh${NC}"
+echo -e "${YELLOW}══════════════════════════════════════════${NC}"
+echo ""

setup.sh

@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+CYAN='\033[0;36m'
+NC='\033[0m'
+
+info()   { echo -e "${GREEN}[+]${NC} $*"; }
+die()    { echo -e "${RED}[ERROR]${NC} $*" >&2; exit 1; }
+header() { echo -e "\n${CYAN}══════════════════════════════════════════${NC}"; echo -e "${CYAN}  $*${NC}"; echo -e "${CYAN}══════════════════════════════════════════${NC}"; }
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+header "TinyBoard Setup"
+echo ""
+echo "  1) Set up this device as a new spoke"
+echo "  2) Onboard a new spoke from the hub"
+echo "  3) Set up this device as a new hub"
+echo ""
+read -rp "Choose [1/2/3]: " CHOICE
+
+case "$CHOICE" in
+1)
+    [ "$(id -u)" -eq 0 ] || die "Spoke setup must be run as root"
+    info "Starting spoke setup..."
+    exec "$SCRIPT_DIR/spoke/setup-spoke.sh"
+    ;;
+2)
+    info "Starting hub onboarding..."
+    exec "$SCRIPT_DIR/hub/onboard-spoke.sh"
+    ;;
+3)
+    [ "$(id -u)" -eq 0 ] || die "Hub setup must be run as root"
+    info "Starting hub setup..."
+    exec "$SCRIPT_DIR/hub/setup-hub.sh"
+    ;;
+*)
+    die "Invalid choice"
+    ;;
+esac

spoke/setup-spoke.sh

@@ -0,0 +1,276 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+HUB_HOST=""
+HUB_USER=""
+SPOKE_USER=""
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+SPOKE_DIR="$SCRIPT_DIR"
+COMPOSE="$SPOKE_DIR/compose.yaml"
+START_PORT=11111
+
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+CYAN='\033[0;36m'
+NC='\033[0m'
+
+retry_or_abort() {
+    local test_cmd="$1"
+    local fail_msg="$2"
+    while true; do
+        if eval "$test_cmd" 2>/dev/null; then
+            return 0
+        fi
+        echo ""
+        warn "$fail_msg"
+        echo -e "  ${YELLOW}[R]${NC} Retry   ${RED}[A]${NC} Abort"
+        read -rp "Choice: " CHOICE
+        case "${CHOICE,,}" in
+            r) info "Retrying..." ;;
+            a) die "Aborted." ;;
+            *) warn "Press R to retry or A to abort." ;;
+        esac
+    done
+}
+
+info()   { echo -e "${GREEN}[+]${NC} $*"; }
+warn()   { echo -e "${YELLOW}[!]${NC} $*"; }
+die()    { echo -e "${RED}[ERROR]${NC} $*" >&2; exit 1; }
+header() { echo -e "\n${CYAN}══════════════════════════════════════════${NC}"; echo -e "${CYAN}  $*${NC}"; echo -e "${CYAN}══════════════════════════════════════════${NC}"; }
+
+[ "$(id -u)" -eq 0 ] || die "Run as root"
+
+read -rp "Hub hostname [oily.dad]: " HUB_HOST
+HUB_HOST="${HUB_HOST:-oily.dad}"
+read -rp "Hub SSH user [armbian]: " HUB_USER
+HUB_USER="${HUB_USER:-armbian}"
+read -rp "Spoke local user [armbian]: " SPOKE_USER
+SPOKE_USER="${SPOKE_USER:-armbian}"
+ARMBIAN_HOME="/home/$SPOKE_USER"
+SSH_DIR="$ARMBIAN_HOME/.ssh"
+
+header "TinyBoard Spoke Setup"
+
+header "Detecting Package Manager"
+if command -v apt-get >/dev/null 2>&1; then
+    PKG_MANAGER="apt"
+    PKG_INSTALL="apt-get install -y -q"
+    OPENSSH_PKG="openssh-server"
+    AUTOSSH_PKG="autossh"
+    info "Detected: apt (Debian/Ubuntu)"
+    apt-get update -q
+elif command -v dnf >/dev/null 2>&1; then
+    PKG_MANAGER="dnf"
+    PKG_INSTALL="dnf install -y -q"
+    OPENSSH_PKG="openssh-server"
+    AUTOSSH_PKG="autossh"
+    info "Detected: dnf (Fedora/RHEL/Alma/Rocky)"
+    dnf check-update -q || true
+elif command -v yum >/dev/null 2>&1; then
+    PKG_MANAGER="yum"
+    PKG_INSTALL="yum install -y -q"
+    OPENSSH_PKG="openssh-server"
+    AUTOSSH_PKG="autossh"
+    info "Detected: yum (older RHEL/CentOS)"
+    yum check-update -q || true
+elif command -v pacman >/dev/null 2>&1; then
+    PKG_MANAGER="pacman"
+    PKG_INSTALL="pacman -S --noconfirm --quiet"
+    OPENSSH_PKG="openssh"
+    AUTOSSH_PKG="autossh"
+    info "Detected: pacman (Arch)"
+    pacman -Sy --quiet
+else
+    die "No supported package manager found (apt, dnf, yum, pacman)"
+fi
+
+header "Installing Packages"
+if ! command -v curl >/dev/null 2>&1; then
+    $PKG_INSTALL curl
+fi
+
+$PKG_INSTALL vim "$AUTOSSH_PKG" "$OPENSSH_PKG" git
+
+info "Installing Docker..."
+if ! command -v docker >/dev/null 2>&1; then
+    if [ "$PKG_MANAGER" = "apt" ]; then
+        $PKG_INSTALL docker.io docker-compose-plugin
+    else
+        curl -fsSL https://get.docker.com | bash
+    fi
+else
+    warn "Docker already installed, skipping."
+fi
+
+if ! docker compose version >/dev/null 2>&1; then
+    if [ "$PKG_MANAGER" = "apt" ]; then
+        $PKG_INSTALL docker-compose-plugin
+    else
+        warn "docker compose not available — Docker install script should have included it."
+    fi
+fi
+
+info "Adding $SPOKE_USER to docker group..."
+usermod -aG docker "$SPOKE_USER" 2>/dev/null || true
+
+info "Enabling SSH server..."
+if systemctl enable ssh 2>/dev/null; then
+    systemctl start ssh
+elif systemctl enable sshd 2>/dev/null; then
+    systemctl start sshd
+else
+    warn "Could not enable SSH service — please start it manually."
+fi
+
+header "Hostname Setup"
+CURRENT_HOSTNAME=$(hostname)
+echo -e "Current hostname: ${YELLOW}$CURRENT_HOSTNAME${NC}"
+read -rp "Enter a hostname for this spoke (e.g. rocky, gouda, camembert): " SPOKE_NAME
+SPOKE_NAME="${SPOKE_NAME:-$CURRENT_HOSTNAME}"
+hostnamectl set-hostname "$SPOKE_NAME"
+echo "$SPOKE_NAME" > /etc/hostname
+info "Hostname set to: $SPOKE_NAME"
+
+header "SSH Key Setup"
+echo "How would you like to handle the SSH key for the tunnel to $HUB_HOST?"
+echo "  1) Generate a new key automatically"
+echo "  2) Use an existing key (paste the private key)"
+echo ""
+read -rp "Choose [1/2]: " KEY_CHOICE
+
+case "$KEY_CHOICE" in
+1)
+    read -rp "Key name [hubkey]: " KEY_NAME
+    KEY_NAME="${KEY_NAME:-hubkey}"
+    KEY_PATH="$SSH_DIR/$KEY_NAME"
+    mkdir -p "$SSH_DIR"
+    chown "$SPOKE_USER":"$SPOKE_USER" "$SSH_DIR"
+    chmod 700 "$SSH_DIR"
+
+    if [ -f "$KEY_PATH" ]; then
+        warn "Key $KEY_PATH already exists, using it."
+    else
+        info "Generating new ED25519 key..."
+        sudo -u "$SPOKE_USER" ssh-keygen -t ed25519 -f "$KEY_PATH" -N ""
+        chown "$SPOKE_USER":"$SPOKE_USER" "$KEY_PATH" "$KEY_PATH.pub"
+        chmod 600 "$KEY_PATH"
+    fi
+
+    echo ""
+    echo -e "${YELLOW}══════════════════════════════════════════${NC}"
+    echo -e "${YELLOW}  Send this public key to the hub owner${NC}"
+    echo -e "${YELLOW}  and ask them to add it to ${HUB_USER}@${HUB_HOST} authorized_keys:${NC}"
+    echo -e "${YELLOW}══════════════════════════════════════════${NC}"
+    cat "$KEY_PATH.pub"
+    echo -e "${YELLOW}══════════════════════════════════════════${NC}"
+    echo ""
+    read -rp "Press ENTER once the key has been added to ${HUB_HOST}..."
+    ;;
+2)
+    read -rp "Enter a name for the key file [hubkey]: " KEY_NAME
+    KEY_NAME="${KEY_NAME:-hubkey}"
+    KEY_PATH="$SSH_DIR/$KEY_NAME"
+    mkdir -p "$SSH_DIR"
+    chown "$SPOKE_USER":"$SPOKE_USER" "$SSH_DIR"
+    chmod 700 "$SSH_DIR"
+
+    echo "Paste the private key content below, then press ENTER and CTRL+D:"
+    KEY_CONTENT=$(cat | tr -d '\r')
+    printf '%s\n' "$KEY_CONTENT" > "$KEY_PATH"
+    chown "$SPOKE_USER":"$SPOKE_USER" "$KEY_PATH"
+    chmod 600 "$KEY_PATH"
+    info "Key saved to $KEY_PATH"
+    ;;
+*)
+    die "Invalid choice"
+    ;;
+esac
+
+info "Scanning hub host key..."
+sudo -u "$SPOKE_USER" touch "$SSH_DIR/known_hosts"
+chown "$SPOKE_USER":"$SPOKE_USER" "$SSH_DIR/known_hosts"
+chmod 600 "$SSH_DIR/known_hosts"
+sudo -u "$SPOKE_USER" ssh-keyscan -H "$HUB_HOST" >> "$SSH_DIR/known_hosts" 2>/dev/null
+
+header "Testing SSH Connection"
+info "Testing connection to $HUB_HOST..."
+retry_or_abort \
+    "sudo -u \"$SPOKE_USER\" ssh -i \"$KEY_PATH\" -o BatchMode=yes -o ConnectTimeout=10 \"$HUB_USER@$HUB_HOST\" exit" \
+    "SSH connection to $HUB_HOST failed. Check that the hub owner added your public key."
+
+header "Finding Available Tunnel Port"
+info "Scanning for a free port on $HUB_HOST starting from $START_PORT..."
+TUNNEL_PORT=""
+for PORT in $(seq "$START_PORT" $((START_PORT + 20))); do
+    RESULT=$(sudo -u "$SPOKE_USER" ssh -i "$KEY_PATH" "$HUB_USER@$HUB_HOST" "ss -tlnp | grep :$PORT" 2>/dev/null || true)
+    if [ -z "$RESULT" ]; then
+        TUNNEL_PORT="$PORT"
+        info "Port $TUNNEL_PORT is available."
+        break
+    else
+        warn "Port $PORT is in use, trying next..."
+    fi
+done
+
+[ -n "$TUNNEL_PORT" ] || die "Could not find a free port between $START_PORT and $((START_PORT + 20)). Ask the hub owner to free up a port."
+
+header "Configuring compose.yaml"
+info "Setting port to $TUNNEL_PORT and key to $KEY_NAME..."
+
+sed -i "s|-R [0-9]*:localhost:22|-R ${TUNNEL_PORT}:localhost:22|g" "$COMPOSE"
+sed -i "s|-i /home/[^ ]*/\.ssh/[^ ]*|-i ${SSH_DIR}/${KEY_NAME}|g" "$COMPOSE"
+sed -i "s|/home/armbian/.ssh/[^:]*:/home/armbian/.ssh/[^:]*|${SSH_DIR}/${KEY_NAME}:${SSH_DIR}/${KEY_NAME}|g" "$COMPOSE"
+sed -i "s|container_name: spoke-autossh|container_name: ${SPOKE_NAME}-autossh|g" "$COMPOSE"
+sed -i "s|container_name: spoke-syncthing|container_name: ${SPOKE_NAME}-syncthing|g" "$COMPOSE"
+sed -i "s|hostname: spoke-syncthing|hostname: ${SPOKE_NAME}-syncthing|g" "$COMPOSE"
+sed -i '/^version:/d' "$COMPOSE"
+
+SYNCTHING_MOUNT="$ARMBIAN_HOME/st"
+mkdir -p "$SYNCTHING_MOUNT"
+chown "$SPOKE_USER":"$SPOKE_USER" "$SYNCTHING_MOUNT"
+
+header "Building Docker Image"
+cd "$SPOKE_DIR"
+docker build \
+    --build-arg UID="$(id -u "$SPOKE_USER")" \
+    --build-arg GID="$(id -g "$SPOKE_USER")" \
+    -t spoke-autossh .
+
+header "Starting Containers"
+docker compose up -d
+info "Waiting for tunnel to establish..."
+sleep 6
+
+LOGS=$(docker logs "${SPOKE_NAME}-autossh" 2>&1 || docker logs spoke-autossh 2>&1 || true)
+if echo "$LOGS" | grep -q "remote port forwarding failed"; then
+    warn "Tunnel failed — port $TUNNEL_PORT may have been taken between check and connect."
+    warn "Try running: docker compose down && docker compose up -d"
+    warn "Or re-run this script."
+else
+    info "Tunnel is up on port $TUNNEL_PORT."
+fi
+
+header "Setup Complete"
+echo -e "  Spoke name:    ${GREEN}$SPOKE_NAME${NC}"
+echo -e "  Tunnel port:   ${GREEN}$TUNNEL_PORT${NC} on $HUB_HOST"
+echo -e "  SSH key:       ${GREEN}$KEY_PATH${NC}"
+echo ""
+echo -e "${YELLOW}The hub owner needs to do the following on ${HUB_HOST}:${NC}"
+echo ""
+echo "  1. Generate a hub->spoke key:"
+echo "     ssh-keygen -t ed25519 -f ~/.ssh/armbian-${SPOKE_NAME}-$(date +%Y%m)"
+echo ""
+echo "  2. Copy it to this spoke through the tunnel:"
+echo "     ssh-copy-id -i ~/.ssh/armbian-${SPOKE_NAME}-$(date +%Y%m).pub -p $TUNNEL_PORT ${HUB_USER}@localhost"
+echo ""
+echo "  3. Add an rclone remote in ~/.config/rclone/rclone.conf:"
+echo "     [${SPOKE_NAME}-remote]"
+echo "     type = sftp"
+echo "     host = localhost"
+echo "     port = $TUNNEL_PORT"
+echo "     key_file = /home/$HUB_USER/.ssh/armbian-${SPOKE_NAME}-$(date +%Y%m)"
+echo "     shell_type = unix"
+echo "     md5sum_command = md5sum"
+echo "     sha1sum_command = sha1sum"
+echo ""