diff --git a/libvirt.md b/libvirt.md
index 05e63e0..55c9077 100755
--- a/libvirt.md
+++ b/libvirt.md
@@ -11,3 +11,11 @@ title: libvirt notes
 ```bash
 # virsh net-start default
 ```
+
+## `no polkit agent available to authenticate action 'org.libvirt.unix.manage'`
+
+add user to `libvirt` group
+
+```bash
+usermod -a -G libvirt user
+```