diff --git a/build-image/first-boot.bash b/build-image/first-boot.bash
index fdcaaac06..2dc27e752 100755
--- a/build-image/first-boot.bash
+++ b/build-image/first-boot.bash
@@ -138,9 +138,10 @@ if tryUntil "ping -c1 9.9.9.9 >/dev/null || wget -S -t 3 --waitretry=4 http://ww
       cat /etc/wpa_supplicant/wpa_supplicant.conf
       rm -f /etc/wpa_supplicant/wpa_supplicant.conf
     else
-      echo "$(timestamp) [openHABian] The public internet is not reachable. Please check your network."
+      echo "$(timestamp) [openHABian] The public internet is not reachable. Please check your local network environment."
+      echo "$(timestamp) [openHABian] We will continue trying to get your system installed, but without proper Internet connectivity this is not guaranteed to work."
     fi
-    fail_inprogress
+    #fail_inprogress
   fi
 echo "OK"
 
@@ -156,7 +157,9 @@ if apt-get --yes upgrade &>/dev/null; then echo "OK"; else echo "FAILED"; fail_i
 if hash python3 2>/dev/null; then bash /boot/webif.bash reinsure_running; fi
 
 echo -n "$(timestamp) [openHABian] Installing git package... "
-if apt-get install --yes git &>/dev/null; then echo "OK"; else echo "FAILED"; fail_inprogress; fi
+if ! cond_redirect dpkg -s "git" &>/dev/null; then
+  if apt-get install --yes git &>/dev/null; then echo "OK"; else echo "FAILED"; fail_inprogress; fi
+fi
 
 if [ -d /opt/openhabian ]; then cd /opt && rm -rf /opt/openhabian; fi
 # shellcheck disable=SC2154
diff --git a/docs/openhabian.md b/docs/openhabian.md
index e38ac77d7..a0796d79b 100644
--- a/docs/openhabian.md
+++ b/docs/openhabian.md
@@ -279,7 +279,7 @@ You'll also see added commits when executing the "Update" function within the op
 ### <a id="successful"></a>Did my Installation succeed? What to do in case of a problem?
 
 A note on **patience**: stay calm - the openHABian setup will take 15 up to 45 minutes to complete all steps.
-The amount of time highly depends on your device's performance and a number of extrenal factors such as your internet connection.
+The amount of time highly depends on your device's performance and a number of external factors such as your internet connection.
 
 
 <!--
@@ -330,20 +330,19 @@ If the installation was **not successful** you will see a warning and further in
 After the installation of openHABian was successful, you should be able to access the openHAB dashboard:
 
 - Raspberry Pi image setup: [http://openhab:8080](http://openhab:8080)
-- In any case: [http://your-device-hostname:8080](http://your-device-hostname:8080) or [http://192.168.0.2:8080](http://192.168.0.2:8080) (replace name/IP)
+- In any case: [http://your-device-hostname:8080](http://your-device-hostname:8080) or [http://192.168.0.2:8080](http://192.168.0.2:8080) (replace name/IP with yours)
 
 #### What's next?
 If you are not able to access your system via the openHAB dashboard or SSH after more than one hour, chances are high that your hardware setup is the problem. Consult the [debug guide](openhabian-DEBUG.md) and move on from there.
 
-#### <a id="switch-openhab-branch"></a>Can I switch from openHAB 2 stable to the testing or unstable branch?
+####<a id="switch-openhab-branch"></a>Can I switch from openHAB 2 stable to the testing or unstable branch?
 openHABian installs the latest stable build of openHAB 2.
 If you want to switch over to the snapshot or milestone release, please do so via the openHABian Configuration Tool.
 Switching from stable to newer development releases might introduce changes and incompatibilities, so please be sure to make a full openHAB backup first!
 
 Check the Linux installation article for all needed details: [Linux: Changing Versions](https://www.openhab.org/docs/installation/linux.html#changing-versions)
 
-{#headache}
-#### Where is the graphical user interface?
+#### <a id="headache"></a>Where is the graphical user interface?
 I've just installed openHABian and now I'm confused.
 No fancy login screen, no windows, no mouse support. What did I get into?
 
@@ -364,9 +363,8 @@ However as you are willing to tinker with smart home technology, I'm sure you ar
 **If** the above didn't convince you, execute the following commands to get the graphical user interface [Pixel](https://www.raspberrypi.org/blog/introducing-pixel) installed.
 You have been warned, if there came any warranty with openHABian to begin with, it would end here.
 
-{#faq-other-platforms}
-#### Can I use openHABian on ...?
-See the [README](../README.md) for a list of supported HW and OS.
+####<a id="faq-other-platforms"></a>Can I use openHABian on ...?
+See the [README](#../README.md) for a list of supported HW and OS.
 openHABian is developed for Debian/Ubuntu based systems.
 If your operating system is based on these or if your hardware supports one, your chances are high openHABian can be used.
 Check out the [Manual Setup](#manual-setup) instructions for guidance and consult the [debug guide](openhabian-DEBUG.md) if you run into problems.
diff --git a/functions/nodejs-apps.bash b/functions/nodejs-apps.bash
index c0a8cefcf..f089bb594 100644
--- a/functions/nodejs-apps.bash
+++ b/functions/nodejs-apps.bash
@@ -36,8 +36,8 @@ frontail_setup() {
   if [ -d "$frontail_base" ]; then
     cond_redirect npm uninstall -g frontail
   fi
-  if ! cond_redirect npm install -g frontail; then echo "FAILED (frontail)"; return 1; fi
-  cond_redirect npm update -g frontail
+  if ! cond_redirect npm install --force -g frontail; then echo "FAILED (frontail)"; return 1; fi
+  cond_redirect npm update --force -g frontail
   #
   mkdir -p "${frontail_base}"/preset "${frontail_base}"/web/assets/styles
 
diff --git a/functions/openhabian.bash b/functions/openhabian.bash
index 0d78198a8..74a49b72c 100644
--- a/functions/openhabian.bash
+++ b/functions/openhabian.bash
@@ -22,6 +22,11 @@ wait_for_apt_to_finish_update() {
   wait -f ${PID_APT} 2>/dev/null
 }
 
+install_cleanup() {
+  echo "$(timestamp) [openHABian] Cleaning up ... "
+  cond_redirect apt --yes autoremove -q
+}
+
 openhabian_announcements() {
   local newsfile="${BASEDIR}/NEWS.md"
   local readnews="${BASEDIR}/docs/LASTNEWS.md"
diff --git a/functions/zram.bash b/functions/zram.bash
index 0561a7a63..eb372afa9 100644
--- a/functions/zram.bash
+++ b/functions/zram.bash
@@ -1,8 +1,29 @@
 #!/usr/bin/env bash
 
+## install code needed to compile ZRAM tools at installation time
+## can be called standalone from build.bash or during install from init_zram_mounts()
+## argument is destination directory
+##
+##   install_zram_code(String dir)
+##
+install_zram_code() {
+  local ZRAMGIT=https://github.com/mstormi/openhabian-zram
+  local OVERLAYFSGIT=https://github.com/kmxz/overlayfs-tools
+  local TAG=openhabian_v1.6
+  cond_redirect apt-get install -y -q --no-install-recommends make libattr1-dev
+
+  mkdir -p "$1"
+  cd $1 || return 1;
+  git clone -q "$OVERLAYFSGIT"
+  git clone -q --branch "$TAG" "$ZRAMGIT"
+  cd - || return 1;
+}
+
 init_zram_mounts() {
   local introtext="You are about to activate the ZRAM feature.\\nBe aware you do this at your own risk of data loss.\\nPlease check out the \"ZRAM status\" thread at https://community.openhab.org/t/zram-status/80996 before proceeding."
   local text_lowmem="Your system has less than 1 GB of RAM. It is definitely NOT recommended to run ZRAM (AND openHAB) on your box. If you proceed now you will do so at your own risk !"
+  local ZRamInstallLocation
+
   if [ "$1" == "install" ]; then
     if [ -z "$UNATTENDED" ]; then
       # display warn disclaimer and point to ZRAM status thread on forum
@@ -13,19 +34,18 @@ init_zram_mounts() {
       fi
     fi
 
-    local ZRAMGIT=https://github.com/mstormi/openhabian-zram
-    local TAG=openhabian_v1.5
-    TMP="$(mktemp -d /tmp/openhabian.XXXXX)"
+    ZRamInstallLocation=/opt/zram
 
-    /usr/bin/git clone -q --branch "$TAG" "$ZRAMGIT" "$TMP"
-    cond_redirect apt-get install -y -q --no-install-recommends make
-    cd "$TMP" || return 1
+    install_zram_code "$ZRamInstallLocation"
+    cd "$ZRamInstallLocation"/overlayfs-tools || return 1
+    make
+    cd "$ZRamInstallLocation" || return 1
     /bin/sh ./install.sh
     /usr/bin/install -m 644 "${BASEDIR:=/opt/openhabian}"/includes/ztab /etc/ztab
-    service zram-config start
-    rm -rf "$TMP"
+
+    cond_redirect systemctl start zram-config
   else
-    service zram-config stop
+    cond_redirect systemctl stop zram-config
     /bin/sh /usr/local/share/zram-config/uninstall.sh
     rm -f /etc/ztab
   fi
diff --git a/openhabian-setup.sh b/openhabian-setup.sh
index b79b9551d..31e4d0f1a 100755
--- a/openhabian-setup.sh
+++ b/openhabian-setup.sh
@@ -106,6 +106,7 @@ if [[ -n "$UNATTENDED" ]]; then
   clean_config_userpw
   frontail_setup
   zram_setup
+  install_cleanup
 else
   apt_update
   whiptail_check