diff --git a/user/hosts/posix.rst b/user/hosts/posix.rst
index 044b8bd..24e811f 100644
--- a/user/hosts/posix.rst
+++ b/user/hosts/posix.rst
@@ -126,7 +126,7 @@ Xubuntu. A minimal installation was used and the following packages installed:
 
 .. code-block:: none
 
-  $ sudu apt-get build-dep gcc-defaults g++ gdb git unzip pax bison \
+  $ sudo apt-get build-dep gcc-defaults g++ gdb git unzip pax bison \
          flex libpython-dev git libncurses5-dev zlib1g-dev
 
 Note that in previous versions of Ubuntu, the package libpython-dev was