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09_uninstall.sh

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+#!/usr/bin/env bash
+set -Eeuo pipefail
+
+SCRIPT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
+CFG="$SCRIPT_DIR/config.sh"
+
+SERVICE_NAME="raspi-backup.service"
+TIMER_NAME="raspi-backup.timer"
+SERVICE_PATH="/etc/systemd/system/${SERVICE_NAME}"
+TIMER_PATH="/etc/systemd/system/${TIMER_NAME}"
+
+LOG_FILE="$SCRIPT_DIR/raspi-backup.log"
+LOCK_FILE="$SCRIPT_DIR/.raspi-backup.lock"
+
+die(){ echo "ERROR: $*" >&2; exit 1; }
+
+host_short(){ hostname -s 2>/dev/null || hostname 2>/dev/null || echo "raspi"; }
+
+echo "== Uninstall =="
+echo
+echo "Das Script entfernt:"
+echo "- systemd Timer/Service"
+echo "- Log/Lock"
+echo "- config.sh"
+echo "- SSH Backup-Key + Alias (nur Backup-bezogen)"
+echo
+echo "NICHT entfernt:"
+echo "- andere SSH-Keys"
+echo "- Backup-Daten auf dem NAS"
+echo
+
+read -r -p "Wirklich deinstallieren? (ja/nein): " ans
+[[ "$ans" == "ja" ]] || { echo "Abgebrochen."; exit 0; }
+
+# ------------------------------------------------------------
+# config laden (für KEY_TYPE, ALIAS_PREFIX, SSH_USER)
+# ------------------------------------------------------------
+if [[ -f "$CFG" ]]; then
+  # shellcheck disable=SC1090
+  source "$CFG"
+else
+  echo "config.sh fehlt – fahre mit Best-Effort fort."
+fi
+
+SSH_USER="${SSH_USER:-admin}"
+KEY_TYPE="${KEY_TYPE:-ed25519}"
+ALIAS_PREFIX="${ALIAS_PREFIX:-nas}"
+hn="$(host_short)"
+
+USER_HOME="$(eval echo "~${SSH_USER}")"
+SSH_DIR="${USER_HOME}/.ssh"
+KEY_FILE="${SSH_DIR}/id_${KEY_TYPE}_${hn}"
+PUB_FILE="${KEY_FILE}.pub"
+SSH_CFG="${SSH_DIR}/config"
+ALIAS="${ALIAS_PREFIX}-${hn}"
+
+# ------------------------------------------------------------
+# systemd entfernen
+# ------------------------------------------------------------
+if command -v systemctl >/dev/null 2>&1; then
+  if [[ "${EUID:-$(id -u)}" -eq 0 ]]; then
+    systemctl disable --now "$TIMER_NAME" >/dev/null 2>&1 || true
+    rm -f "$SERVICE_PATH" "$TIMER_PATH"
+    systemctl daemon-reload >/dev/null 2>&1 || true
+  elif command -v sudo >/dev/null 2>&1; then
+    sudo bash -c "
+      systemctl disable --now '$TIMER_NAME' >/dev/null 2>&1 || true
+      rm -f '$SERVICE_PATH' '$TIMER_PATH'
+      systemctl daemon-reload >/dev/null 2>&1 || true
+    " || true
+  fi
+  echo "systemd Timer/Service entfernt."
+fi
+
+# ------------------------------------------------------------
+# SSH Alias entfernen
+# ------------------------------------------------------------
+if [[ -f "$SSH_CFG" ]] && command -v awk >/dev/null 2>&1; then
+  tmp="$(mktemp)"
+  awk -v host="$ALIAS" '
+    BEGIN {skip=0}
+    $1=="Host" && $2==host {skip=1; next}
+    $1=="Host" && $2!=host {skip=0}
+    skip==0 {print}
+  ' "$SSH_CFG" >"$tmp" && mv "$tmp" "$SSH_CFG"
+  echo "SSH Alias entfernt: $ALIAS"
+fi
+
+# ------------------------------------------------------------
+# SSH Keys entfernen (nur Backup-Key)
+# ------------------------------------------------------------
+rm -f "$KEY_FILE" "$PUB_FILE" 2>/dev/null || true
+echo "SSH Backup-Key entfernt:"
+echo "  $KEY_FILE"
+echo "  $PUB_FILE"
+
+# ------------------------------------------------------------
+# .ssh Ordner ggf. entfernen (nur wenn leer)
+# ------------------------------------------------------------
+if [[ -d "$SSH_DIR" ]] && [[ -z "$(ls -A "$SSH_DIR")" ]]; then
+  rmdir "$SSH_DIR"
+  echo ".ssh Ordner war leer → entfernt."
+else
+  echo ".ssh Ordner bleibt bestehen (enthält weitere Dateien)."
+fi
+
+# ------------------------------------------------------------
+# config + log + lock entfernen
+# ------------------------------------------------------------
+rm -f "$CFG" "$LOG_FILE" "$LOCK_FILE" 2>/dev/null || true
+echo "config.sh, Log und Lock entfernt."
+
+echo
+echo "Uninstall abgeschlossen."
+echo
+echo "Wenn du auch die Scripts löschen willst:"
+echo "rm -f \\"
+echo "  $SCRIPT_DIR/start.sh \\"
+echo "  $SCRIPT_DIR/01_setup.sh \\"
+echo "  $SCRIPT_DIR/02_setup_ssh.sh \\"
+echo "  $SCRIPT_DIR/03_verify.sh \\"
+echo "  $SCRIPT_DIR/04_run_backup.sh \\"
+echo "  $SCRIPT_DIR/05_status.sh \\"
+echo "  $SCRIPT_DIR/06_logs.sh \\"
+echo "  $SCRIPT_DIR/07_timer_enable.sh \\"
+echo "  $SCRIPT_DIR/08_timer_disable.sh \\"
+echo "  $SCRIPT_DIR/09_uninstall.sh"