diff --git a/install/install.sh b/install/install.sh
old mode 100644
new mode 100755
index 4fb6b3c..3822974
--- a/install/install.sh
+++ b/install/install.sh
@@ -1,31 +1,210 @@
 #!/usr/bin/env bash
-# Script d'installation des agents SentinelMesh
+# Installation d'un agent SentinelMesh
+# Usage : curl -fsSL http://<backend>:8080/install.sh | bash -s -- --server http://<backend>:8080 --token <token> --agent-type scan-network
 set -euo pipefail
 
+# --- Paramètres ---
 SERVER=""
 PORT="8080"
 TOKEN=""
 AGENT_TYPE=""
 HOSTNAME_OVERRIDE=""
+VERSION="latest"
+GITEA_URL="https://git.maison43gil.com"
+GITEA_REPO="gilles/SentinelMesh"
 
 usage() {
-    echo "Usage: $0 --server <url> --token <token> --agent-type <scan-network|metric> [--port <port>] [--hostname <name>]"
+    cat <<EOF
+Usage: $0 [OPTIONS]
+
+Options obligatoires :
+  --server     <url>              URL du backend SentinelMesh (ex: http://192.168.1.10:8080)
+  --token      <token>            Token d'authentification
+  --agent-type <scan-network|metric>  Type d'agent à installer
+
+Options facultatives :
+  --port       <port>             Port du backend (défaut: 8080)
+  --hostname   <name>             Nom d'hôte (défaut: auto-détecté)
+  --version    <tag>              Version à installer (défaut: latest)
+EOF
     exit 1
 }
 
 while [[ $# -gt 0 ]]; do
     case "$1" in
-        --server)   SERVER="$2";           shift 2 ;;
-        --port)     PORT="$2";             shift 2 ;;
-        --token)    TOKEN="$2";            shift 2 ;;
-        --agent-type) AGENT_TYPE="$2";    shift 2 ;;
-        --hostname) HOSTNAME_OVERRIDE="$2"; shift 2 ;;
-        *) usage ;;
+        --server)     SERVER="$2";            shift 2 ;;
+        --port)       PORT="$2";              shift 2 ;;
+        --token)      TOKEN="$2";             shift 2 ;;
+        --agent-type) AGENT_TYPE="$2";        shift 2 ;;
+        --hostname)   HOSTNAME_OVERRIDE="$2"; shift 2 ;;
+        --version)    VERSION="$2";           shift 2 ;;
+        -h|--help)    usage ;;
+        *) echo "Option inconnue : $1"; usage ;;
     esac
 done
 
 [[ -z "$SERVER" || -z "$TOKEN" || -z "$AGENT_TYPE" ]] && usage
+[[ "$AGENT_TYPE" != "scan-network" && "$AGENT_TYPE" != "metric" ]] && {
+    echo "Erreur : --agent-type doit être 'scan-network' ou 'metric'"
+    exit 1
+}
 
-# TODO Phase 5 : téléchargement binaire, création config, enregistrement backend, service systemd
+# --- Détection ---
+HOSTNAME="${HOSTNAME_OVERRIDE:-$(hostname -f 2>/dev/null || cat /etc/hostname || echo "unknown")}"
+AGENT_ID="$(echo "${AGENT_TYPE}-${HOSTNAME}" | tr '.' '-')"
 
-echo "Installation agent-${AGENT_TYPE} → ${SERVER}:${PORT} (non implémenté — Phase 5)"
+detect_arch() {
+    case "$(uname -m)" in
+        x86_64)              echo "x86_64-unknown-linux-gnu" ;;
+        aarch64|arm64)       echo "aarch64-unknown-linux-gnu" ;;
+        armv7l)              echo "armv7-unknown-linux-gnueabihf" ;;
+        *) echo "Architecture non supportée : $(uname -m)" >&2; exit 1 ;;
+    esac
+}
+ARCH="$(detect_arch)"
+
+# --- Chemins ---
+BINARY_NAME="agent-${AGENT_TYPE}"
+INSTALL_DIR="/usr/local/bin"
+CONFIG_DIR="/etc/sentinelmesh"
+SERVICE_NAME="sentinelmesh-${AGENT_TYPE}"
+SERVICE_FILE="/etc/systemd/system/${SERVICE_NAME}.service"
+
+# Port API locale selon le type d'agent
+[[ "$AGENT_TYPE" == "scan-network" ]] && API_PORT="9100" || API_PORT="9101"
+
+# --- Vérifications ---
+[[ "$EUID" -ne 0 ]] && { echo "Erreur : ce script doit être exécuté en root (sudo)."; exit 1; }
+command -v curl &>/dev/null || { echo "Erreur : curl est requis."; exit 1; }
+command -v systemctl &>/dev/null || { echo "Erreur : systemd est requis."; exit 1; }
+
+echo "========================================"
+echo " Installation SentinelMesh — ${BINARY_NAME}"
+echo "========================================"
+echo " Serveur     : ${SERVER}"
+echo " Agent ID    : ${AGENT_ID}"
+echo " Hostname    : ${HOSTNAME}"
+echo " Architecture: ${ARCH}"
+echo " Version     : ${VERSION}"
+echo "========================================"
+
+# --- Téléchargement ---
+if [[ "$VERSION" == "latest" ]]; then
+    DOWNLOAD_URL="${GITEA_URL}/${GITEA_REPO}/releases/download/latest/${BINARY_NAME}-${ARCH}"
+else
+    DOWNLOAD_URL="${GITEA_URL}/${GITEA_REPO}/releases/download/${VERSION}/${BINARY_NAME}-${ARCH}"
+fi
+
+echo "[1/5] Téléchargement du binaire…"
+TMP_BIN="$(mktemp)"
+if ! curl -fsSL -o "$TMP_BIN" "$DOWNLOAD_URL"; then
+    echo "Erreur : impossible de télécharger ${DOWNLOAD_URL}"
+    echo "Conseil : vérifiez que la version ${VERSION} est publiée sur Gitea."
+    rm -f "$TMP_BIN"
+    exit 1
+fi
+chmod +x "$TMP_BIN"
+mv "$TMP_BIN" "${INSTALL_DIR}/${BINARY_NAME}"
+echo "  → ${INSTALL_DIR}/${BINARY_NAME}"
+
+# --- Configuration ---
+echo "[2/5] Création de la configuration…"
+mkdir -p "$CONFIG_DIR"
+cat > "${CONFIG_DIR}/${AGENT_TYPE}.yaml" <<YAML
+backend:
+  url: ${SERVER}
+  token: ${TOKEN}
+
+agent:
+  id: ${AGENT_ID}
+  hostname: ${HOSTNAME}
+
+$(if [[ "$AGENT_TYPE" == "scan-network" ]]; then
+cat <<SCAN
+scan:
+  subnets:
+    - 10.0.0.0/22
+  interval_seconds: 60
+  ping_timeout_ms: 1000
+  service_timeout_ms: 300
+  concurrency: 50
+  ports: [22, 80, 443, 445, 2049, 1883, 2375, 8006, 8123, 3000, 9090, 9100]
+
+api:
+  listen: "0.0.0.0:${API_PORT}"
+SCAN
+else
+cat <<METRIC
+intervals:
+  realtime_ms: 1000
+  medium_s: 1800
+
+api:
+  listen: "0.0.0.0:${API_PORT}"
+METRIC
+fi)
+YAML
+chmod 600 "${CONFIG_DIR}/${AGENT_TYPE}.yaml"
+echo "  → ${CONFIG_DIR}/${AGENT_TYPE}.yaml"
+
+# --- Service systemd ---
+echo "[3/5] Création du service systemd…"
+cat > "$SERVICE_FILE" <<SYSTEMD
+[Unit]
+Description=SentinelMesh agent-${AGENT_TYPE}
+Documentation=https://git.maison43gil.com/gilles/SentinelMesh
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=simple
+ExecStart=${INSTALL_DIR}/${BINARY_NAME} ${CONFIG_DIR}/${AGENT_TYPE}.yaml
+Restart=on-failure
+RestartSec=10
+User=root
+StandardOutput=journal
+StandardError=journal
+SyslogIdentifier=${SERVICE_NAME}
+$(if [[ "$AGENT_TYPE" == "scan-network" ]]; then
+echo "# Accès réseau nécessaire pour les scans ICMP/ARP"
+echo "AmbientCapabilities=CAP_NET_RAW CAP_NET_ADMIN"
+fi)
+
+[Install]
+WantedBy=multi-user.target
+SYSTEMD
+echo "  → ${SERVICE_FILE}"
+
+# --- Activation ---
+echo "[4/5] Activation et démarrage du service…"
+systemctl daemon-reload
+systemctl enable "$SERVICE_NAME"
+systemctl restart "$SERVICE_NAME"
+sleep 2
+
+if systemctl is-active --quiet "$SERVICE_NAME"; then
+    echo "  → Service ${SERVICE_NAME} démarré avec succès"
+else
+    echo "  ⚠ Le service ne s'est pas démarré correctement"
+    echo "    Vérifier avec : journalctl -u ${SERVICE_NAME} -n 30"
+fi
+
+# --- Enregistrement backend ---
+echo "[5/5] Enregistrement auprès du backend…"
+LOCAL_IP="$(hostname -I | awk '{print $1}')"
+curl -fsSL -X POST "${SERVER}/api/v1/agents" \
+    -H "Authorization: Bearer ${TOKEN}" \
+    -H "Content-Type: application/json" \
+    -d "{\"id\":\"${AGENT_ID}\",\"hostname\":\"${HOSTNAME}\",\"agent_type\":\"${AGENT_TYPE}\",\"ip\":\"${LOCAL_IP}\",\"version\":\"${VERSION}\"}" \
+    &>/dev/null && echo "  → Agent enregistré" || echo "  ⚠ Enregistrement échoué (l'agent réessaiera au démarrage)"
+
+echo ""
+echo "========================================"
+echo " Installation terminée !"
+echo ""
+echo " Commandes utiles :"
+echo "   Statut  : systemctl status ${SERVICE_NAME}"
+echo "   Logs    : journalctl -u ${SERVICE_NAME} -f"
+echo "   Config  : ${CONFIG_DIR}/${AGENT_TYPE}.yaml"
+echo "   API locale : http://localhost:${API_PORT}"
+echo "========================================"