Updated linux install script

Fix libresh install by adding .git at the end and removing $LIBRE_VERSION. Add git installation for multiple distro.

install.linux.sh

@@ -88,13 +88,23 @@ echo "ADMIN_EMAIL=${ADMIN_EMAIL}" >> /etc/environment
 
 # STEP Install Docker 
 
-echo "-------- Install latest docker "
-# TODO : Fix a version for docker  ? 
+name="docker-ce"
+# TODO : Fix a version for docker  ?
 
+    dpkg -s $name &> /dev/null  
 
-curl -fsSL https://get.docker.com -o get-docker.sh
-sh get-docker.sh 
+    if [ $? -ne 0 ]
 
+        then
+            echo "$name not installed"  
+            apt-get update
+            curl -fsSL https://get.docker.com -o get-docker.sh
+            sh get-docker.sh
+            echo "-------- Latest docker installed "
+
+        else
+            echo    "$name already installed"
+    fi
 
 # STEP "install docker-compose" 
 echo "-------- Install latest docker-compose "