diff --git a/3.New_server_deployment/4.APT_upgrade/sources16.list b/3.New_server_deployment/4.APT_upgrade/sources16.list
index aaa9ba29af27dea92e3fa931fcef0c9e888b6483..b967902f2f39724ad74c31998b6bb383b9c84818 100644
--- a/3.New_server_deployment/4.APT_upgrade/sources16.list
+++ b/3.New_server_deployment/4.APT_upgrade/sources16.list
@@ -1,49 +1,4 @@
-# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
-# newer versions of the distribution.
-deb http://fr.archive.ubuntu.com/ubuntu/ xenial main restricted
-# deb-src http://fr.archive.ubuntu.com/ubuntu/ xenial main restricted
-
-## Major bug fix updates produced after the final release of the
-## distribution.
-deb http://fr.archive.ubuntu.com/ubuntu/ xenial-updates main restricted
-# deb-src http://fr.archive.ubuntu.com/ubuntu/ xenial-updates main restricted
-
-## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
-## team. Also, please note that software in universe WILL NOT receive any
-## review or updates from the Ubuntu security team.
-deb http://fr.archive.ubuntu.com/ubuntu/ xenial universe
-# deb-src http://fr.archive.ubuntu.com/ubuntu/ xenial universe
-deb http://fr.archive.ubuntu.com/ubuntu/ xenial-updates universe
-# deb-src http://fr.archive.ubuntu.com/ubuntu/ xenial-updates universe
-
-## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu 
-## team, and may not be under a free licence. Please satisfy yourself as to 
-## your rights to use the software. Also, please note that software in 
-## multiverse WILL NOT receive any review or updates from the Ubuntu
-## security team.
-deb http://fr.archive.ubuntu.com/ubuntu/ xenial multiverse
-# deb-src http://fr.archive.ubuntu.com/ubuntu/ xenial multiverse
-deb http://fr.archive.ubuntu.com/ubuntu/ xenial-updates multiverse
-# deb-src http://fr.archive.ubuntu.com/ubuntu/ xenial-updates multiverse
-
-## N.B. software from this repository may not have been tested as
-## extensively as that contained in the main release, although it includes
-## newer versions of some applications which may provide useful features.
-## Also, please note that software in backports WILL NOT receive any review
-## or updates from the Ubuntu security team.
-deb http://fr.archive.ubuntu.com/ubuntu/ xenial-backports main restricted universe multiverse
-# deb-src http://fr.archive.ubuntu.com/ubuntu/ xenial-backports main restricted universe multiverse
-
-## Uncomment the following two lines to add software from Canonical's
-## 'partner' repository.
-## This software is not part of Ubuntu, but is offered by Canonical and the
-## respective vendors as a service to Ubuntu users.
-# deb http://archive.canonical.com/ubuntu xenial partner
-# deb-src http://archive.canonical.com/ubuntu xenial partner
-
-deb http://security.ubuntu.com/ubuntu xenial-security main restricted
-# deb-src http://security.ubuntu.com/ubuntu xenial-security main restricted
-deb http://security.ubuntu.com/ubuntu xenial-security universe
-# deb-src http://security.ubuntu.com/ubuntu xenial-security universe
-deb http://security.ubuntu.com/ubuntu xenial-security multiverse
-# deb-src http://security.ubuntu.com/ubuntu xenial-security multiverse
+deb http://archive.ubuntu.com/ubuntu/ xenial           main restricted universe multiverse
+deb http://archive.ubuntu.com/ubuntu/ xenial-updates   main restricted universe multiverse
+deb http://archive.ubuntu.com/ubuntu/ xenial-backports main restricted universe multiverse
+deb http://security.ubuntu.com/ubuntu xenial-security  main restricted universe multiverse
\ No newline at end of file