diff --git a/.zk/notebook.db b/.zk/notebook.db
index 0444e4c..06a59de 100644
Binary files a/.zk/notebook.db and b/.zk/notebook.db differ
diff --git a/zk/Basic_model_of_the_operating_system.md b/zk/Basic_model_of_the_operating_system.md
index d629809..d697867 100644
--- a/zk/Basic_model_of_the_operating_system.md
+++ b/zk/Basic_model_of_the_operating_system.md
@@ -4,7 +4,7 @@ tags:
   - Linux
 ---
 
-# Basic model of a \*nix operating system
+# Basic model of a nix operating system
 
 We can abstract the Linux OS into three operational levels or tiers, from the
 bottom up: