Refactor code for improved readability and performance

scripts/manage/snapshot-before-change.sh

@@ -0,0 +1,34 @@
+#!/bin/bash
+# Create Snapshots Before Making Changes
+# Usage: ./snapshot-before-change.sh <VMID> [snapshot-name]
+
+set -euo pipefail
+
+VMID="${1:-}"
+SNAPSHOT_NAME="${2:-pre-change-$(date +%Y%m%d-%H%M%S)}"
+
+if [[ -z "$VMID" ]]; then
+    echo "Usage: $0 <VMID> [snapshot-name]"
+    echo "Example: $0 106 pre-upgrade-20241219"
+    exit 1
+fi
+
+if ! command -v pct >/dev/null 2>&1; then
+    echo "Error: pct command not found. This script must be run on Proxmox host."
+    exit 1
+fi
+
+if [[ $EUID -ne 0 ]]; then
+    echo "Error: This script must be run as root"
+    exit 1
+fi
+
+echo "Creating snapshot '$SNAPSHOT_NAME' for container $VMID..."
+if pct snapshot "$VMID" "$SNAPSHOT_NAME"; then
+    echo "✓ Snapshot created successfully"
+    echo "  To restore: pct rollback $VMID $SNAPSHOT_NAME"
+    echo "  To list: pct listsnapshot $VMID"
+else
+    echo "✗ Failed to create snapshot"
+    exit 1
+fi