check for systemd

install

@@ -13,7 +13,7 @@
 # https://github.com/armbian/config/blob/master/debian-software
 # https://forum.openmediavault.org/index.php/Thread/25062-Install-OMV5-on-Debian-10-Buster/
 #
-# version: 1.0.3
+# version: 1.0.4
 #
 
 if [[ $(id -u) -ne 0 ]]; then
@@ -21,6 +21,12 @@ if [[ $(id -u) -ne 0 ]]; then
   exit 99
 fi
 
+systemd="$(ps --no-headers -o comm 1)"
+if [ ! "${systemd}" = "systemd" ]; then
+  echo "This system is not running systemd.  Exiting..."
+  exit 100
+fi
+
 declare -l codename
 declare -l omvCodename
 declare -l omvInstall=""