Sanitize hostname generation from VM_NAME

Replace the previous simple space-removal with stricter sanitization when deriving the hostname from VM_NAME. Non-alphanumeric/hyphen sequences are collapsed to a single hyphen and leading/trailing hyphens are trimmed, preserving lowercase and ensuring a cleaner, more valid hostname string.

CHANGELOG.md

@@ -423,8 +423,28 @@ Exercise vigilance regarding copycat or coat-tailing sites that seek to exploit
 
 </details>
 
+## 2026-03-16
+
+### 🚀 Updated Scripts
+
+  - #### 🐞 Bug Fixes
+
+    - Tautulli: add setuptools<81 constraint to update script [@MickLesk](https://github.com/MickLesk) ([#12959](https://github.com/community-scripts/ProxmoxVE/pull/12959))
+    - Seerr: add missing build deps [@MickLesk](https://github.com/MickLesk) ([#12960](https://github.com/community-scripts/ProxmoxVE/pull/12960))
+    - fix: yubal update [@CrazyWolf13](https://github.com/CrazyWolf13) ([#12961](https://github.com/community-scripts/ProxmoxVE/pull/12961))
+
+### 💾 Core
+
+  - #### 🐞 Bug Fixes
+
+    - hwaccel: remove ROCm install from AMD APU setup [@MickLesk](https://github.com/MickLesk) ([#12958](https://github.com/community-scripts/ProxmoxVE/pull/12958))
+
 ## 2026-03-15
 
+### 🆕 New Scripts
+
+  - Yamtrack ([#12936](https://github.com/community-scripts/ProxmoxVE/pull/12936))
+
 ### 🚀 Updated Scripts
 
   - #### 🐞 Bug Fixes
@@ -445,6 +465,10 @@ Exercise vigilance regarding copycat or coat-tailing sites that seek to exploit
 
     - core: retry downloads with exponential backoff [@MickLesk](https://github.com/MickLesk) ([#12896](https://github.com/community-scripts/ProxmoxVE/pull/12896))
 
+### ❔ Uncategorized
+
+  - [go2rtc] Add ffmpeg dependency to install script [@Copilot](https://github.com/Copilot) ([#12944](https://github.com/community-scripts/ProxmoxVE/pull/12944))
+
 ## 2026-03-14
 
 ### 🚀 Updated Scripts

ct/headers/yamtrack

@@ -0,0 +1,6 @@
+__  __                __                  __  
+\ \/ /___ _____ ___  / /__________ ______/ /__
+ \  / __ `/ __ `__ \/ __/ ___/ __ `/ ___/ //_/
+ / / /_/ / / / / / / /_/ /  / /_/ / /__/ ,<   
+/_/\__,_/_/ /_/ /_/\__/_/   \__,_/\___/_/|_|  
+                                              

ct/seerr.sh

@@ -128,6 +128,8 @@ EOF
 
     CLEAN_INSTALL=1 fetch_and_deploy_gh_release "seerr" "seerr-team/seerr" "tarball"
 
+    ensure_dependencies build-essential python3-setuptools
+
     msg_info "Updating PNPM Version"
     pnpm_desired=$(grep -Po '"pnpm":\s*"\K[^"]+' /opt/seerr/package.json)
     NODE_VERSION="22" NODE_MODULE="pnpm@$pnpm_desired" setup_nodejs

ct/sparkyfitness.sh

@@ -79,7 +79,7 @@ function update_script() {
 
   [Install]
   WantedBy=multi-user.target
-  EOF
+EOF
     systemctl daemon-reload
     msg_ok "Refreshed SparkyFitness Service"
 

ct/tautulli.sh

@@ -51,6 +51,7 @@ function update_script() {
     $STD source /opt/Tautulli/.venv/bin/activate
     $STD uv pip install -r requirements.txt
     $STD uv pip install pyopenssl
+    $STD uv pip install "setuptools<81"
     msg_ok "Updated Tautulli"
 
     msg_info "Restoring config and database"

ct/yamtrack.sh

@@ -0,0 +1,83 @@
+#!/usr/bin/env bash
+source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/build.func)
+
+# Copyright (c) 2021-2026 community-scripts ORG
+# Author: MickLesk (CanbiZ)
+# License: MIT | https://github.com/community-scripts/ProxmoxVE/raw/main/LICENSE
+# Source: https://github.com/FuzzyGrim/Yamtrack
+
+APP="Yamtrack"
+var_tags="${var_tags:-media;tracker;movies;anime}"
+var_cpu="${var_cpu:-2}"
+var_ram="${var_ram:-2048}"
+var_disk="${var_disk:-8}"
+var_os="${var_os:-debian}"
+var_version="${var_version:-13}"
+var_unprivileged="${var_unprivileged:-1}"
+
+header_info "$APP"
+variables
+color
+catch_errors
+
+function update_script() {
+  header_info
+  check_container_storage
+  check_container_resources
+
+  if [[ ! -d /opt/yamtrack ]]; then
+    msg_error "No ${APP} Installation Found!"
+    exit
+  fi
+
+  if check_for_gh_release "yamtrack" "FuzzyGrim/Yamtrack"; then
+    msg_info "Stopping Services"
+    systemctl stop yamtrack yamtrack-celery
+    msg_ok "Stopped Services"
+
+    msg_info "Backing up Data"
+    cp /opt/yamtrack/src/.env /opt/yamtrack_env.bak
+    msg_ok "Backed up Data"
+
+    CLEAN_INSTALL=1 fetch_and_deploy_gh_release "yamtrack" "FuzzyGrim/Yamtrack" "tarball"
+
+    msg_info "Installing Python Dependencies"
+    cd /opt/yamtrack
+    $STD uv venv .venv
+    $STD uv pip install --no-cache-dir -r requirements.txt
+    msg_ok "Installed Python Dependencies"
+
+    msg_info "Restoring Data"
+    cp /opt/yamtrack_env.bak /opt/yamtrack/src/.env
+    rm -f /opt/yamtrack_env.bak
+    msg_ok "Restored Data"
+
+    msg_info "Updating Yamtrack"
+    cd /opt/yamtrack/src
+    $STD /opt/yamtrack/.venv/bin/python manage.py migrate
+    $STD /opt/yamtrack/.venv/bin/python manage.py collectstatic --noinput
+    msg_ok "Updated Yamtrack"
+
+    msg_info "Updating Nginx Configuration"
+    cp /opt/yamtrack/nginx.conf /etc/nginx/nginx.conf
+    sed -i 's|user abc;|user www-data;|' /etc/nginx/nginx.conf
+    sed -i 's|/yamtrack/staticfiles/|/opt/yamtrack/src/staticfiles/|' /etc/nginx/nginx.conf
+    $STD systemctl reload nginx
+    msg_ok "Updated Nginx Configuration"
+
+    msg_info "Starting Services"
+    systemctl start yamtrack yamtrack-celery
+    msg_ok "Started Services"
+    msg_ok "Updated successfully!"
+  fi
+  exit
+}
+
+start
+build_container
+description
+
+msg_ok "Completed Successfully!\n"
+echo -e "${CREATING}${GN}${APP} setup has been successfully initialized!${CL}"
+echo -e "${INFO}${YW} Access it using the following URL:${CL}"
+echo -e "${TAB}${GATEWAY}${BGN}http://${IP}:8000${CL}"

ct/yubal.sh

@@ -47,7 +47,7 @@ function update_script() {
 
     msg_info "Installing Python Dependencies"
     cd /opt/yubal
-    $STD uv sync --no-dev --frozen
+    $STD uv sync --package yubal-api --no-dev --frozen
     msg_ok "Installed Python Dependencies"
 
     msg_info "Starting Services"

install/go2rtc-install.sh

@@ -14,6 +14,10 @@ network_check
 update_os
 setup_hwaccel
 
+msg_info "Installing Dependencies"
+$STD apt install -y ffmpeg
+msg_ok "Installed Dependencies"
+
 USE_ORIGINAL_FILENAME="true" fetch_and_deploy_gh_release "go2rtc" "AlexxIT/go2rtc" "singlefile" "latest" "/opt/go2rtc" "go2rtc_linux_amd64"
 
 msg_info "Creating Service"

install/seerr-install.sh

@@ -14,7 +14,9 @@ network_check
 update_os
 
 msg_info "Installing Dependencies"
-$STD apt-get install -y build-essential
+$STD apt install -y \
+  build-essential \
+  python3-setuptools
 msg_ok "Installed Dependencies"
 
 fetch_and_deploy_gh_release "seerr" "seerr-team/seerr" "tarball"

install/yamtrack-install.sh

@@ -0,0 +1,105 @@
+#!/usr/bin/env bash
+
+# Copyright (c) 2021-2026 community-scripts ORG
+# Author: MickLesk (CanbiZ)
+# License: MIT | https://github.com/community-scripts/ProxmoxVE/raw/main/LICENSE
+# Source: https://github.com/FuzzyGrim/Yamtrack
+
+source /dev/stdin <<<"$FUNCTIONS_FILE_PATH"
+color
+verb_ip6
+catch_errors
+setting_up_container
+network_check
+update_os
+
+msg_info "Installing Dependencies"
+$STD apt install -y \
+  nginx \
+  redis-server
+msg_ok "Installed Dependencies"
+
+PG_VERSION="16" setup_postgresql
+PG_DB_NAME="yamtrack" PG_DB_USER="yamtrack" setup_postgresql_db
+PYTHON_VERSION="3.12" setup_uv
+
+fetch_and_deploy_gh_release "yamtrack" "FuzzyGrim/Yamtrack" "tarball"
+
+msg_info "Installing Python Dependencies"
+cd /opt/yamtrack
+$STD uv venv .venv
+$STD uv pip install --no-cache-dir -r requirements.txt
+msg_ok "Installed Python Dependencies"
+
+msg_info "Configuring Yamtrack"
+SECRET=$(openssl rand -hex 32)
+cat <<EOF >/opt/yamtrack/src/.env
+SECRET=${SECRET}
+DB_HOST=localhost
+DB_NAME=${PG_DB_NAME}
+DB_USER=${PG_DB_USER}
+DB_PASSWORD=${PG_DB_PASS}
+DB_PORT=5432
+REDIS_URL=redis://localhost:6379
+URLS=http://${LOCAL_IP}:8000
+EOF
+
+cd /opt/yamtrack/src
+$STD /opt/yamtrack/.venv/bin/python manage.py migrate
+$STD /opt/yamtrack/.venv/bin/python manage.py collectstatic --noinput
+msg_ok "Configured Yamtrack"
+
+msg_info "Configuring Nginx"
+rm -f /etc/nginx/sites-enabled/default /etc/nginx/sites-available/default
+cp /opt/yamtrack/nginx.conf /etc/nginx/nginx.conf
+sed -i 's|user abc;|user www-data;|' /etc/nginx/nginx.conf
+sed -i 's|pid /tmp/nginx.pid;|pid /run/nginx.pid;|' /etc/nginx/nginx.conf
+sed -i 's|/yamtrack/staticfiles/|/opt/yamtrack/src/staticfiles/|' /etc/nginx/nginx.conf
+sed -i 's|error_log /dev/stderr|error_log /var/log/nginx/error.log|' /etc/nginx/nginx.conf
+sed -i 's|access_log /dev/stdout|access_log /var/log/nginx/access.log|' /etc/nginx/nginx.conf
+$STD nginx -t
+systemctl enable -q nginx
+$STD systemctl restart nginx
+msg_ok "Configured Nginx"
+
+msg_info "Creating Services"
+cat <<EOF >/etc/systemd/system/yamtrack.service
+[Unit]
+Description=Yamtrack Gunicorn
+After=network.target postgresql.service redis-server.service
+Requires=postgresql.service redis-server.service
+
+[Service]
+Type=simple
+WorkingDirectory=/opt/yamtrack/src
+ExecStart=/opt/yamtrack/.venv/bin/gunicorn config.wsgi:application -b 127.0.0.1:8001 -w 2 --timeout 120
+Restart=on-failure
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target
+EOF
+
+cat <<EOF >/etc/systemd/system/yamtrack-celery.service
+[Unit]
+Description=Yamtrack Celery Worker
+After=network.target postgresql.service redis-server.service yamtrack.service
+Requires=postgresql.service redis-server.service
+
+[Service]
+Type=simple
+WorkingDirectory=/opt/yamtrack/src
+ExecStart=/opt/yamtrack/.venv/bin/celery -A config worker --beat --scheduler django --loglevel INFO
+Restart=on-failure
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target
+EOF
+
+systemctl enable -q --now redis-server yamtrack yamtrack-celery
+msg_ok "Created Services"
+
+motd_ssh
+customize
+cleanup_lxc

misc/tools.func

@@ -4629,9 +4629,6 @@ _setup_amd_apu() {
     $STD apt -y install firmware-amd-graphics 2>/dev/null || true
   fi
 
-  # ROCm compute stack (OpenCL + HIP) - also works for many APUs
-  _setup_rocm "$os_id" "$os_codename"
-
   msg_ok "AMD APU configured"
 }
 

vm/archlinux-vm.sh

@@ -310,7 +310,10 @@ function advanced_settings() {
       HN="arch-linux"
       echo -e "${HOSTNAME}${BOLD}${DGN}Hostname: ${BGN}$HN${CL}"
     else
-      HN=$(echo "${VM_NAME,,}" | tr -d ' ')
+      HN=$(echo "${VM_NAME,,}" | tr -cs 'a-z0-9-' '-' | sed 's/^-//;s/-$//')
+      if [ "$HN" != "${VM_NAME,,}" ]; then
+        whiptail --backtitle "Proxmox VE Helper Scripts" --title "HOSTNAME ADJUSTED" --msgbox "Invalid characters detected. Hostname has been adjusted to:\n\n  $HN" 10 58
+      fi
       echo -e "${HOSTNAME}${BOLD}${DGN}Hostname: ${BGN}$HN${CL}"
     fi
   else

vm/debian-13-vm.sh

@@ -325,7 +325,10 @@ function advanced_settings() {
       HN="debian"
       echo -e "${HOSTNAME}${BOLD}${DGN}Hostname: ${BGN}$HN${CL}"
     else
-      HN=$(echo "${VM_NAME,,}" | tr -d ' ')
+      HN=$(echo "${VM_NAME,,}" | tr -cs 'a-z0-9-' '-' | sed 's/^-//;s/-$//')
+      if [ "$HN" != "${VM_NAME,,}" ]; then
+        whiptail --backtitle "Proxmox VE Helper Scripts" --title "HOSTNAME ADJUSTED" --msgbox "Invalid characters detected. Hostname has been adjusted to:\n\n  $HN" 10 58
+      fi
       echo -e "${HOSTNAME}${BOLD}${DGN}Hostname: ${BGN}$HN${CL}"
     fi
   else

vm/debian-vm.sh

@@ -315,7 +315,10 @@ function advanced_settings() {
       HN="debian"
       echo -e "${HOSTNAME}${BOLD}${DGN}Hostname: ${BGN}$HN${CL}"
     else
-      HN=$(echo ${VM_NAME,,} | tr -d ' ')
+      HN=$(echo "${VM_NAME,,}" | tr -cs 'a-z0-9-' '-' | sed 's/^-//;s/-$//')
+      if [ "$HN" != "${VM_NAME,,}" ]; then
+        whiptail --backtitle "Proxmox VE Helper Scripts" --title "HOSTNAME ADJUSTED" --msgbox "Invalid characters detected. Hostname has been adjusted to:\n\n  $HN" 10 58
+      fi
       echo -e "${HOSTNAME}${BOLD}${DGN}Hostname: ${BGN}$HN${CL}"
     fi
   else

vm/docker-vm.sh

@@ -251,7 +251,10 @@ function advanced_settings() {
     if [ -z $VM_NAME ]; then
       HN="docker"
     else
-      HN=$(echo ${VM_NAME,,} | tr -d ' ')
+      HN=$(echo "${VM_NAME,,}" | tr -cs 'a-z0-9-' '-' | sed 's/^-//;s/-$//')
+      if [ "$HN" != "${VM_NAME,,}" ]; then
+        whiptail --backtitle "Proxmox VE Helper Scripts" --title "HOSTNAME ADJUSTED" --msgbox "Invalid characters detected. Hostname has been adjusted to:\n\n  $HN" 10 58
+      fi
     fi
     echo -e "${HOSTNAME}${BOLD}${DGN}Hostname: ${BGN}$HN${CL}"
   else

vm/haos-vm.sh

@@ -391,7 +391,10 @@ function advanced_settings() {
       HN="haos${BRANCH}"
       echo -e "${HOSTNAME}${BOLD}${DGN}Hostname: ${BGN}$HN${CL}"
     else
-      HN=$(echo ${VM_NAME,,} | tr -d ' ')
+      HN=$(echo "${VM_NAME,,}" | tr -cs 'a-z0-9-' '-' | sed 's/^-//;s/-$//')
+      if [ "$HN" != "${VM_NAME,,}" ]; then
+        whiptail --backtitle "Proxmox VE Helper Scripts" --title "HOSTNAME ADJUSTED" --msgbox "Invalid characters detected. Hostname has been adjusted to:\n\n  $HN" 10 58
+      fi
       echo -e "${HOSTNAME}${BOLD}${DGN}Hostname: ${BGN}$HN${CL}"
     fi
   else

vm/mikrotik-routeros.sh

@@ -377,7 +377,10 @@ function advanced_settings() {
       HN="mikrotik-routeros-chr"
       echo -e "${HOSTNAME}${BOLD}${DGN}Hostname: ${BGN}$HN${CL}"
     else
-      HN=$(echo ${VM_NAME,,} | tr -d ' ')
+      HN=$(echo "${VM_NAME,,}" | tr -cs 'a-z0-9-' '-' | sed 's/^-//;s/-$//')
+      if [ "$HN" != "${VM_NAME,,}" ]; then
+        whiptail --backtitle "Proxmox VE Helper Scripts" --title "HOSTNAME ADJUSTED" --msgbox "Invalid characters detected. Hostname has been adjusted to:\n\n  $HN" 10 58
+      fi
       echo -e "${HOSTNAME}${BOLD}${DGN}Hostname: ${BGN}$HN${CL}"
     fi
   else

vm/nextcloud-vm.sh

@@ -313,7 +313,10 @@ function advanced_settings() {
       HN="nextcloud-vm"
       echo -e "${HOSTNAME}${BOLD}${DGN}Hostname: ${BGN}$HN${CL}"
     else
-      HN=$(echo ${VM_NAME,,} | tr -d ' ')
+      HN=$(echo "${VM_NAME,,}" | tr -cs 'a-z0-9-' '-' | sed 's/^-//;s/-$//')
+      if [ "$HN" != "${VM_NAME,,}" ]; then
+        whiptail --backtitle "Proxmox VE Helper Scripts" --title "HOSTNAME ADJUSTED" --msgbox "Invalid characters detected. Hostname has been adjusted to:\n\n  $HN" 10 58
+      fi
       echo -e "${HOSTNAME}${BOLD}${DGN}Hostname: ${BGN}$HN${CL}"
     fi
   else

vm/openwrt-vm.sh

@@ -328,7 +328,10 @@ function advanced_settings() {
     if [ -z $VM_NAME ]; then
       HN="openwrt"
     else
-      HN=$(echo ${VM_NAME,,} | tr -d ' ')
+      HN=$(echo "${VM_NAME,,}" | tr -cs 'a-z0-9-' '-' | sed 's/^-//;s/-$//')
+      if [ "$HN" != "${VM_NAME,,}" ]; then
+        whiptail --backtitle "Proxmox VE Helper Scripts" --title "HOSTNAME ADJUSTED" --msgbox "Invalid characters detected. Hostname has been adjusted to:\n\n  $HN" 10 58
+      fi
     fi
     echo -e "${DGN}Using Hostname: ${BGN}$HN${CL}"
   else

vm/opnsense-vm.sh

@@ -421,7 +421,10 @@ function advanced_settings() {
     if [ -z "$VM_NAME" ]; then
       HN="OPNsense"
     else
-      HN=$(echo ${VM_NAME,,} | tr -d ' ')
+      HN=$(echo "${VM_NAME,,}" | tr -cs 'a-z0-9-' '-' | sed 's/^-//;s/-$//')
+      if [ "$HN" != "${VM_NAME,,}" ]; then
+        whiptail --backtitle "Proxmox VE Helper Scripts" --title "HOSTNAME ADJUSTED" --msgbox "Invalid characters detected. Hostname has been adjusted to:\n\n  $HN" 10 58
+      fi
     fi
     echo -e "${DGN}Using Hostname: ${BGN}$HN${CL}"
   else

vm/owncloud-vm.sh

@@ -314,7 +314,10 @@ function advanced_settings() {
       HN="owncloud-vm"
       echo -e "${HOSTNAME}${BOLD}${DGN}Hostname: ${BGN}$HN${CL}"
     else
-      HN=$(echo ${VM_NAME,,} | tr -d ' ')
+      HN=$(echo "${VM_NAME,,}" | tr -cs 'a-z0-9-' '-' | sed 's/^-//;s/-$//')
+      if [ "$HN" != "${VM_NAME,,}" ]; then
+        whiptail --backtitle "Proxmox VE Helper Scripts" --title "HOSTNAME ADJUSTED" --msgbox "Invalid characters detected. Hostname has been adjusted to:\n\n  $HN" 10 58
+      fi
       echo -e "${HOSTNAME}${BOLD}${DGN}Hostname: ${BGN}$HN${CL}"
     fi
   else

vm/pimox-haos-vm.sh

@@ -274,7 +274,10 @@ function advanced_settings() {
     echo -e "${DGN}Using Hostname: ${BGN}$HN${CL}"
   else
     if [ $exitstatus = 0 ]; then
-      HN=$(echo ${VM_NAME,,} | tr -d ' ')
+      HN=$(echo "${VM_NAME,,}" | tr -cs 'a-z0-9-' '-' | sed 's/^-//;s/-$//')
+      if [ "$HN" != "${VM_NAME,,}" ]; then
+        whiptail --backtitle "Proxmox VE Helper Scripts" --title "HOSTNAME ADJUSTED" --msgbox "Invalid characters detected. Hostname has been adjusted to:\n\n  $HN" 10 58
+      fi
       echo -e "${DGN}Using Hostname: ${BGN}$HN${CL}"
     fi
   fi

vm/truenas-vm.sh

@@ -355,7 +355,10 @@ function advanced_settings() {
     if [ -z $VM_NAME ]; then
       echo -e "${HOSTNAME}${BOLD}${DGN}Hostname: ${BGN}$HN${CL}"
     else
-      HN=$(echo ${VM_NAME,,} | tr -d ' ')
+      HN=$(echo "${VM_NAME,,}" | tr -cs 'a-z0-9-' '-' | sed 's/^-//;s/-$//')
+      if [ "$HN" != "${VM_NAME,,}" ]; then
+        whiptail --backtitle "Proxmox VE Helper Scripts" --title "HOSTNAME ADJUSTED" --msgbox "Invalid characters detected. Hostname has been adjusted to:\n\n  $HN" 10 58
+      fi
       echo -e "${HOSTNAME}${BOLD}${DGN}Hostname: ${BGN}$HN${CL}"
     fi
   else

vm/ubuntu2204-vm.sh

@@ -310,7 +310,10 @@ function advanced_settings() {
       HN="ubuntu"
       echo -e "${HOSTNAME}${BOLD}${DGN}Hostname: ${BGN}$HN${CL}"
     else
-      HN=$(echo ${VM_NAME,,} | tr -d ' ')
+      HN=$(echo "${VM_NAME,,}" | tr -cs 'a-z0-9-' '-' | sed 's/^-//;s/-$//')
+      if [ "$HN" != "${VM_NAME,,}" ]; then
+        whiptail --backtitle "Proxmox VE Helper Scripts" --title "HOSTNAME ADJUSTED" --msgbox "Invalid characters detected. Hostname has been adjusted to:\n\n  $HN" 10 58
+      fi
       echo -e "${HOSTNAME}${BOLD}${DGN}Hostname: ${BGN}$HN${CL}"
     fi
   else

vm/ubuntu2404-vm.sh

@@ -313,7 +313,10 @@ function advanced_settings() {
       HN="ubuntu"
       echo -e "${HOSTNAME}${BOLD}${DGN}Hostname: ${BGN}$HN${CL}"
     else
-      HN=$(echo ${VM_NAME,,} | tr -d ' ')
+      HN=$(echo "${VM_NAME,,}" | tr -cs 'a-z0-9-' '-' | sed 's/^-//;s/-$//')
+      if [ "$HN" != "${VM_NAME,,}" ]; then
+        whiptail --backtitle "Proxmox VE Helper Scripts" --title "HOSTNAME ADJUSTED" --msgbox "Invalid characters detected. Hostname has been adjusted to:\n\n  $HN" 10 58
+      fi
       echo -e "${HOSTNAME}${BOLD}${DGN}Hostname: ${BGN}$HN${CL}"
     fi
   else

vm/ubuntu2504-vm.sh

@@ -312,7 +312,10 @@ function advanced_settings() {
       HN="ubuntu"
       echo -e "${HOSTNAME}${BOLD}${DGN}Hostname: ${BGN}$HN${CL}"
     else
-      HN=$(echo ${VM_NAME,,} | tr -d ' ')
+      HN=$(echo "${VM_NAME,,}" | tr -cs 'a-z0-9-' '-' | sed 's/^-//;s/-$//')
+      if [ "$HN" != "${VM_NAME,,}" ]; then
+        whiptail --backtitle "Proxmox VE Helper Scripts" --title "HOSTNAME ADJUSTED" --msgbox "Invalid characters detected. Hostname has been adjusted to:\n\n  $HN" 10 58
+      fi
       echo -e "${HOSTNAME}${BOLD}${DGN}Hostname: ${BGN}$HN${CL}"
     fi
   else

vm/umbrel-os-vm.sh

@@ -373,7 +373,10 @@ function advanced_settings() {
       HN="umbrelos"
       echo -e "${HOSTNAME}${BOLD}${DGN}Hostname: ${BGN}$HN${CL}"
     else
-      HN=$(echo ${VM_NAME,,} | tr -d ' ')
+      HN=$(echo "${VM_NAME,,}" | tr -cs 'a-z0-9-' '-' | sed 's/^-//;s/-$//')
+      if [ "$HN" != "${VM_NAME,,}" ]; then
+        whiptail --backtitle "Proxmox VE Helper Scripts" --title "HOSTNAME ADJUSTED" --msgbox "Invalid characters detected. Hostname has been adjusted to:\n\n  $HN" 10 58
+      fi
       echo -e "${HOSTNAME}${BOLD}${DGN}Hostname: ${BGN}$HN${CL}"
     fi
   else