diff --git a/INSTALL_LINUX.md b/INSTALL_LINUX.md
index ecf7f77082a57b255738429b025c637f1b937f76..543e3e7a75e3c26c01aeb3121e11cea259c2c0f8 100644
--- a/INSTALL_LINUX.md
+++ b/INSTALL_LINUX.md
@@ -1,7 +1,7 @@
 # Instructions to install libre.sh on linux with Systemd
 
 ## Recommendation
-- Systemd (debian 8 or debian 9, CentOS 7 ...)
+- Systemd distro (ubuntu server 18.04.3 or debian 9 )
 
 # Installation
 Where basicly reproduce what the user_data do for us.
@@ -74,6 +74,10 @@ MAIL_PORT=587
 EOF
 ```
 
+#install docker
+
+# Current tested version : 19.03.5 see https://docs.docker.com/install/linux/docker-ce/ubuntu/
+
 # install docker-compose
 
 *Remark I did a variante to find the last version of DockerCompose and download it*