diff --git a/pve-zfs-postinstall.sh b/postinstall
old mode 100644
new mode 100755
similarity index 51%
rename from pve-zfs-postinstall.sh
rename to postinstall
index d2e7f64..87435f4
--- a/pve-zfs-postinstall.sh
+++ b/postinstall
@@ -8,6 +8,8 @@
 # - Install and configure zfs-auto-snapshot
 # - Switch pve-enterprise/pve-no-subscription repo
 # - Disable "No subscription message" in webinterface in no-subscription mode
+# - Add pve-enterprise subscription key
+# - Configure ceph repo 
 # - Update system to the latest version
 # - Install common tools
 # - Install Proxmox SDN Extensions
@@ -60,6 +62,10 @@ SWAPPINESS=$(cat /proc/sys/vm/swappiness)
 # zfs-auto-snapshot default values
 declare -A auto_snap_keep=( ["frequent"]="12" ["hourly"]="96" ["daily"]="14" ["weekly"]="6" ["monthly"]="3" )
 
+# gather proxmox subscription info
+serverid=$(pvesubscription get | grep serverid | cut -d' ' -f2)
+sub_status=$(pvesubscription get | grep status | cut -d' ' -f2)
+
 #### FUNCTIONS ####
 
 roundup(){
@@ -99,7 +105,6 @@ cancel_dialog() {
 }
 
 arc_suggestion(){
-
     ZFS_ARC_MIN_MEGABYTES=$(roundoff $(($ZPOOL_SIZE_SUM_BYTES / 2048 / 1024 / 1024)))
     ZFS_ARC_MAX_MEGABYTES=$(roundup $(($ZPOOL_SIZE_SUM_BYTES / 1024 / 1024 / 1024)))
 
@@ -125,8 +130,11 @@ Suggested values: \n \
 }
 
 arc_set_manual() {
-    if ! ZFS_ARC_MIN_MEGABYTES=$(inputbox_int 'CONFIGURE ZFS L1ARC MIN SIZE' 'Please enter zfs_arc_min in MB' 7 $ZFS_ARC_MIN_MEGABYTES) ; then cancel_dialog ; fi
-    if ! ZFS_ARC_MAX_MEGABYTES=$(inputbox_int 'CONFIGURE ZFS L1ARC MAX SIZE' 'Please enter zfs_arc_max in MB' 7 $ZFS_ARC_MAX_MEGABYTES) ; then cancel_dialog ; fi
+    if [ $ARC_MIN_CURRENT_MB -gt 0 ]; then MIN_VALUE=$ARC_MIN_CURRENT_MB; else $ZFS_ARC_MIN_MEGABYTES; fi
+    if [ $ARC_MAX_CURRENT_MB -gt 0 ]; then MAX_VALUE=$ARC_MAX_CURRENT_MB; else $ZFS_ARC_MAX_MEGABYTES; fi
+
+    if ! ZFS_ARC_MIN_MEGABYTES=$(inputbox_int 'CONFIGURE ZFS L1ARC MIN SIZE' 'Please enter zfs_arc_min in MB' 7 $MIN_VALUE) ; then cancel_dialog ; fi
+    if ! ZFS_ARC_MAX_MEGABYTES=$(inputbox_int 'CONFIGURE ZFS L1ARC MAX SIZE' 'Please enter zfs_arc_max in MB' 7 $MAX_VALUE) ; then cancel_dialog ; fi
 }
 
 vm_swappiness () {
@@ -148,36 +156,69 @@ auto_snapshot(){
     done
 }
 
-check_subscription(){
-    serverid=$(pvesh get nodes/px1/subscription --output-format yaml | grep serverid | cut -d' ' -f2)
-    sub_status=$(pvesh get nodes/px1/subscription --output-format yaml | grep status | cut -d' ' -f2)
-    if [[ $sub_status == "notfound" ]]; then
+select_subscription(){
+    suppress_warning=0
+    if [[ $sub_status == "notfound" ]] || [[ $sub_status == "invalid" ]]; then
         if [[ $repo_selection == "pve-enterprise" ]]; then
             if whiptail --title "NO PROXMOX SUBSCRIPTION FOUND" \
             --backtitle $PROG \
             --yes-button "ADD" \
             --no-button "SKIP" \
-            --yesno "Server ID: $serverid\nDo you want to add a subscription key?" 17 76 ; then
-                add_subscription
+            --yesno "Server ID: $serverid\n\nDo you want to add a subscription key?" 9 76 ; then
+                input_subscription
             fi
         else
             if whiptail --title "NO PROXMOX SUBSCRIPTION FOUND" \
             --backtitle $PROG \
             --yes-button "SUPPRESS WARNING" \
             --no-button "SKIP" \
-            --yesno "Do you want to suppress the no subscription warning in WebGUI?" 17 76 ; then
-                suppress_no_subscription_warning
+            --yesno "Do you want to suppress the no subscription warning in WebGUI?" 9 76 ; then
+                suppress_warning=1
             fi
         fi
     fi
 }
 
-add_subscription(){
+ask_locales(){
+    locales=$(whiptail --title "SET LOCALES" --backtitle "$PROG" --inputbox "Please enter a space separated list of locales to generate." 9 76 "$(echo $(grep -vE '#|^$' /etc/locale.gen | cut -d ' ' -f1))" 3>&1 1>&2 2>&3)
+}
 
+input_subscription(){
+    key=""
+    cancel=0
+    while [[ $key == "" ]]; do
+        if ! key=$(whiptail --title "ADD PROXMOX SUBSCRIPTION KEY" --backtitle "$PROG" \
+        --inputbox "Server ID: $serverid\n\nAdd your subscription key" 9 76 3>&1 1>&2 2>&3) ; then
+            cancel=1 ; break
+        fi
+    done
+    if [ $cancel -eq 0 ]; then
+        set_subscription $key
+    fi
+    return $cancel
+}
+
+set_subscription(){
+    if ! pvesubscription set $1; then
+        input_subscription
+    elif [[ $(pvesubscription get | grep status | cut -d' ' -f2) == "invalid" ]]; then
+        input_subscription
+    fi
 }
 
 suppress_no_subscription_warning(){
+    if [ $suppress_warning -gt 0 ]; then
+        # remove old no-sub-hack
+        if [ -f /opt/bashclub/no-sub-hack.sh ] ; then rm -r /opt/bashclub ; fi
+        if [ -f /etc/apt/apt.conf.d/80bashclubapthook ] ; then rm /etc/apt/apt.conf.d/80bashclubapthook ; fi
 
+        wget --no-cache -O /usr/local/bin/suppress_no_subscription_warning https://github.com/bashclub/no-sub-hack/raw/main/no-sub-hack.sh
+        chmod +x /usr/local/bin/suppress_no_subscription_warning
+        /usr/local/bin/suppress_no_subscription_warning
+        cat << EOF > /etc/apt/apt.conf.d/80-suppress_no_subscription_warning
+DPkg::Post-Invoke {"/usr/local/bin/suppress_no_subscription_warning";};
+EOF
+    fi
 }
 
 select_pve_repos(){
@@ -185,13 +226,13 @@ select_pve_repos(){
     pvenosubscription=OFF
     pvetest=OFF
     if [ -f /etc/apt/sources.list.d/pve-enterprise.list ]; then
-        if $(grep -v '#' /etc/apt/sources.list.d/pve-enterprise.list | grep "pve-enterprise") ; then
+        if grep -v '#' /etc/apt/sources.list.d/pve-enterprise.list | grep "pve-enterprise" > /dev/null ; then
             pveenterprise=ON
         else
             if [ -f /etc/apt/sources.list ]; then
-                if $(grep -v '#' /etc/apt/sources.list | grep "pve-no-subscription") ; then
+                if grep -v '#' /etc/apt/sources.list | grep "pve-no-subscription" > /dev/null ; then
                     pvenosubscription=ON
-                elif $(grep -v '#' /etc/apt/sources.list | grep "pvetest") ; then
+                elif grep -v '#' /etc/apt/sources.list | grep "pvetest" > /dev/null ; then
                     pvetest=ON
                 else
                     pveenterprise=ON
@@ -205,6 +246,125 @@ select_pve_repos(){
     "pve-no-subscription" "Proxmox VE No Subscription repository" "$pvenosubscription" \
     "pvetest" "Proxmox VE Testing repository" "$pvetest" 3>&1 1>&2 2>&3)
 
+}
+
+set_locales(){
+    for locale in $locales; do
+        line=$(grep $locale /etc/locale.gen)
+        if echo $line | grep "#" ; then
+            sed -i "s/$line/$(echo $line | cut -d' ' -f2-)" /etc/locale.gen
+        fi
+    done
+    locale-gen
+}
+
+set_pve_repo(){
+    echo ""
+}
+
+update_system(){
+    echo "Getting latest package lists"
+    apt update > /dev/null 2>&1
+    echo "Upgrading system to latest version - Depending on your version this could take a while..."
+    DEBIAN_FRONTEND=noninteractive DEBIAN_PRIORITY=critical apt -y -qq dist-upgrade > /dev/null 2>&1
+}
+
+install_tools(){
+    echo "Installing toolset - Depending on your version this could take a while..."
+    DEBIAN_FRONTEND=noninteractive DEBIAN_PRIORITY=critical apt -y -qq install $REQUIRED_TOOLS $OPTIONAL_TOOLS > /dev/null 2>&1
+}
+
+enable_sdn(){
+    # include interfaces.d to enable SDN features
+    q=$(cat /etc/network/interfaces | grep "source /etc/network/interfaces.d/*")
+    if [ $? -gt 0 ]; then
+        echo "source /etc/network/interfaces.d/*" >> /etc/network/interfaces
+    fi
+}
+
+set_arc_cache(){
+    ZFS_ARC_MIN_BYTES=$((ZFS_ARC_MIN_MEGABYTES * 1024 *1024))
+    ZFS_ARC_MAX_BYTES=$((ZFS_ARC_MAX_MEGABYTES * 1024 *1024))
+    echo "Adjusting ZFS level 1 arc"
+    echo $ZFS_ARC_MIN_BYTES > /sys/module/zfs/parameters/zfs_arc_min
+    echo $ZFS_ARC_MAX_BYTES > /sys/module/zfs/parameters/zfs_arc_max
+    cat << EOF > /etc/modprobe.d/zfs.conf
+options zfs zfs_arc_max=$ZFS_ARC_MAX_BYTES
+options zfs zfs_arc_min=$ZFS_ARC_MIN_BYTES
+EOF
+}
+
+set_auto_snapshot(){
+    # configure zfs-auto-snapshot
+    for interval in "${!auto_snap_keep[@]}"; do
+        echo "Setting zfs-auto-snapshot retention: $interval = ${auto_snap_keep[$interval]}"
+        if [[ "$interval" == "frequent" ]]; then
+            CURRENT=$(cat /etc/cron.d/zfs-auto-snapshot | grep keep | cut -d' ' -f19 | cut -d '=' -f2)
+            if [[ "${auto_snap_keep[$interval]}" != "$CURRENT" ]]; then
+                rpl "keep=$CURRENT" "keep=${auto_snap_keep[$interval]}" /etc/cron.d/zfs-auto-snapshot > /dev/null 2>&1
+            fi
+        else
+            CURRENT=$(cat /etc/cron.$interval/zfs-auto-snapshot | grep keep | cut -d' ' -f6 | cut -d'=' -f2)
+            if [[ "${auto_snap_keep[$interval]}" != "$CURRENT" ]]; then
+                rpl "keep=$CURRENT" "keep=${auto_snap_keep[$interval]}" /etc/cron.$interval/zfs-auto-snapshot > /dev/null 2>&1
+            fi
+        fi
+    done
+}
+
+set_swappiness(){
+    echo "Configuring swappiness"
+    echo "vm.swappiness=$SWAPPINESS" > /etc/sysctl.d/swappiness.conf
+    sysctl -w vm.swappiness=$SWAPPINESS
+}
+
+pve_conf_backup(){
+    echo "Configuring pve-conf-backup"
+    # create backup jobs of /etc
+    zfs list $PVE_CONF_BACKUP_TARGET > /dev/null 2>&1
+    if [ $? -ne 0 ]; then
+        zfs create $PVE_CONF_BACKUP_TARGET
+    fi
+
+    if [[ "$(df -h -t zfs | grep /$ | cut -d ' ' -f1)" == "rpool/ROOT/pve-1" ]] ; then
+        echo "$PVE_CONF_BACKUP_CRON_TIMER root rsync -va --delete /etc /$PVE_CONF_BACKUP_TARGET > /$PVE_CONF_BACKUP_TARGET/pve-conf-backup.log" > /etc/cron.d/pve-conf-backup
+    fi
+}
+
+harden_ssh(){
+    echo ""
+}
+
+set_mail_delivery(){
+    echo ""
+}
+
+create_swap_pool(){
+    echo ""
+}
+
+set_default_volblocksize(){
+    echo ""
+}
+
+installation_task(){
+    set_locales
+    set_pve_repo
+    update_system
+    install_tools
+    enable_sdn
+    set_arc_cache
+    set_swappiness
+    set_auto_snapshot
+    pve_conf_backup
+    suppress_no_subscription_warning
+    harden_ssh
+    set_mail_delivery
+    create_swap_pool
+    set_default_volblocksize
+
+    echo "Updating initramfs - This will take some time..."
+    update-initramfs -u -k all > /dev/null 2>&1
 
 }
 
@@ -216,6 +376,9 @@ arc_suggestion
 # Set swapping behaviour
 vm_swappiness
 
+# Ask for additional locales 
+ask_locales
+
 # Configure count per interval of zfs-auto-snapshot
 auto_snapshot
 
@@ -223,4 +386,6 @@ auto_snapshot
 select_pve_repos
 
 # subscription related actions
-select_subscription
\ No newline at end of file
+select_subscription
+
+echo "Proxmox postinstallation finished!"