pveam: add page (#17489)

pages/linux/pveam.md

@@ -0,0 +1,20 @@
+# pveam
+
+> Manage LXC container templates.
+> More information: <https://pve.proxmox.com/pve-docs/pveam.1.html>.
+
+- Update container template database:
+
+`pveam update`
+
+- List available templates:
+
+`pveam available`
+
+- Download a template:
+
+`pveam download {{local}} {{template_name}}`
+
+- List downloaded templates:
+
+`pveam list {{local}}`