diff --git a/README.md b/README.md
index 7b18909..32052e4 100644
--- a/README.md
+++ b/README.md
@@ -59,3 +59,8 @@ gpg --edit-key $key
 gpg> trust
 Your decision? 5
 ```
+
+## Debugging boot issues
+
+1. Add `rd.systemd.debug_shell` kernel parameter
+2. Press CTRL+ALT+F9 to switch to root shell