diff --git a/architecture/os/tp_linux.ipynb b/architecture/os/tp_linux.ipynb
index 18e6ad5..2b057c9 100644
--- a/architecture/os/tp_linux.ipynb
+++ b/architecture/os/tp_linux.ipynb
@@ -459,7 +459,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "!touch toto.txt"
+    "touch toto.txt"
    ]
   },
   {