diff --git a/index.md b/index.md
index e882ce1a7c4fbbf6af8b4d82ce2e227eefceea1a..184c7cbcad03bf9061802ebaa5a258ead9068e0e 100644
--- a/index.md
+++ b/index.md
@@ -9,5 +9,6 @@ title: #  Unix / command line training course
 3. [First steps in a terminal](http://perso.ens-lyon.fr/laurent.modolo/unix/3_first_steps_in_a_terminal.html)
 4. [The Unix file system.](http://perso.ens-lyon.fr/laurent.modolo/unix/4_unix_file_system.html)
 5. [Users and rights](http://perso.ens-lyon.fr/laurent.modolo/unix/5_users_and_rights.html)
+6. [Unix processes]((http://perso.ens-lyon.fr/laurent.modolo/unix/6_unix_processes.html))