elasticsearch-node: add page (#17512)

pages/common/elasticsearch-node.md

@@ -0,0 +1,28 @@
+# elasticsearch-node
+
+> Manage low-level Elasticsearch node operations such as shutdown, repurpose, or viewing info.
+> More information: <https://www.elastic.co/docs/reference/elasticsearch/command-line-tools/node-tool>.
+
+- Display information about the current node:
+
+`elasticsearch-node info`
+
+- Prepare the node for a full cluster restart (e.g., after upgrading):
+
+`elasticsearch-node unsafe-bootstrap`
+
+- Repurpose a node for a different role (e.g., from master to data node):
+
+`elasticsearch-node repurpose`
+
+- List the roles assigned to the node:
+
+`elasticsearch-node roles`
+
+- Show the installed JVM version, Elasticsearch home path, and other diagnostic information:
+
+`elasticsearch-node diagnostics`
+
+- Display help:
+
+`elasticsearch-node {{[-h|--help]}}`