Technical-informations.md

-This page is intended to provide technical informations hopefully useful for anybody in charge of running the yafits containers.
+This page is intended to provide technical informations hopefully useful for anybody in charge of running the yafits containers. 
 
 # docker daemon.
 Before trying to launch any container, it's advised to ensure that the docker daemon is running.
@@ -6,3 +6,16 @@ Before trying to launch any container, it's advised to ensure that the docker da
 ```
 ps aux|grep dockerd
 ```
+
+If the above command returns nothing then start a session on an account belonging to sudoers and launch 
+
+```
+[caillat-adm@juliette ~]$ sudo service docker start
+[sudo] Mot de passe de caillat-adm : 
+Redirecting to /bin/systemctl start docker.service
+[caillat-adm@juliette ~]$ ps aux|grep dockerd
+root      14212  0.2  0.0 2064984 65392 ?       Ssl  11:59   0:00 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
+
+
+```
+ 
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