Offer Ubuntu 26.04 LTS in the VM OS picker

26.04 is the current LTS. Added to the pickers that take any Debian or
Ubuntu base; the cloud image exists for amd64 and arm64, and Docker's
apt repository carries a resolute dist, so get.docker.com resolves.

unifi-os-server-vm and waydroid-vm are left alone: the UniFi installer
ships its own OS matrix and Waydroid depends on kernel modules, and
neither is verified on 26.04.

Author: MickLesk

vm/docker-vm.sh

@@ -49,9 +49,10 @@ function select_os() {
   if [[ "${VM_UNATTENDED:-0}" == "1" ]]; then
     OS_CHOICE="${VM_OS_VERSION:-debian13}"
   elif ! OS_CHOICE=$(whiptail --backtitle "Proxmox VE Helper Scripts" --title "SELECT OS" --radiolist \
-    "Choose Operating System for Docker VM" 14 68 4 \
+    "Choose Operating System for Docker VM" 15 68 5 \
     "debian13" "Debian 13 (Trixie) - Latest" ON \
     "debian12" "Debian 12 (Bookworm) - Stable" OFF \
+    "ubuntu2604" "Ubuntu 26.04 LTS (Resolute)" OFF \
     "ubuntu2404" "Ubuntu 24.04 LTS (Noble)" OFF \
     "ubuntu2204" "Ubuntu 22.04 LTS (Jammy)" OFF \
     3>&1 1>&2 2>&3); then
@@ -71,6 +72,12 @@ function select_os() {
     OS_CODENAME="bookworm"
     OS_DISPLAY="Debian 12 (Bookworm)"
     ;;
+  ubuntu2604)
+    OS_TYPE="ubuntu"
+    OS_VERSION="26.04"
+    OS_CODENAME="resolute"
+    OS_DISPLAY="Ubuntu 26.04 LTS"
+    ;;
   ubuntu2404)
     OS_TYPE="ubuntu"
     OS_VERSION="24.04"
@@ -84,7 +91,7 @@ function select_os() {
     OS_DISPLAY="Ubuntu 22.04 LTS"
     ;;
   *)
-    msg_error "Unsupported OS '${OS_CHOICE}' (expected debian13, debian12, ubuntu2404 or ubuntu2204)"
+    msg_error "Unsupported OS '${OS_CHOICE}' (expected debian13, debian12, ubuntu2604, ubuntu2404 or ubuntu2204)"
     exit 1
     ;;
   esac

vm/k3s-vm.sh

@@ -56,9 +56,10 @@ function select_os() {
   if [[ "${VM_UNATTENDED:-0}" == "1" ]]; then
     OS_CHOICE="${VM_OS_VERSION:-debian13}"
   elif ! OS_CHOICE=$(whiptail --backtitle "Proxmox VE Helper Scripts" --title "SELECT OS" --radiolist \
-    "Choose Operating System for K3s VM" 14 68 4 \
+    "Choose Operating System for K3s VM" 15 68 5 \
     "debian13" "Debian 13 (Trixie) - Latest" ON \
     "debian12" "Debian 12 (Bookworm) - Stable" OFF \
+    "ubuntu2604" "Ubuntu 26.04 LTS (Resolute)" OFF \
     "ubuntu2404" "Ubuntu 24.04 LTS (Noble)" OFF \
     "ubuntu2204" "Ubuntu 22.04 LTS (Jammy)" OFF \
     3>&1 1>&2 2>&3); then
@@ -78,6 +79,12 @@ function select_os() {
     OS_CODENAME="bookworm"
     OS_DISPLAY="Debian 12 (Bookworm)"
     ;;
+  ubuntu2604)
+    OS_TYPE="ubuntu"
+    OS_VERSION="26.04"
+    OS_CODENAME="resolute"
+    OS_DISPLAY="Ubuntu 26.04 LTS"
+    ;;
   ubuntu2404)
     OS_TYPE="ubuntu"
     OS_VERSION="24.04"
@@ -91,7 +98,7 @@ function select_os() {
     OS_DISPLAY="Ubuntu 22.04 LTS"
     ;;
   *)
-    msg_error "Unsupported OS '${OS_CHOICE}' (expected debian13, debian12, ubuntu2404 or ubuntu2204)"
+    msg_error "Unsupported OS '${OS_CHOICE}' (expected debian13, debian12, ubuntu2604, ubuntu2404 or ubuntu2204)"
     exit 1
     ;;
   esac

vm/netbird-server.sh

@@ -127,9 +127,10 @@ function select_os() {
   if [[ "${VM_UNATTENDED:-0}" == "1" ]]; then
     OS_CHOICE="${VM_OS_VERSION:-debian13}"
   elif ! OS_CHOICE=$(whiptail --backtitle "Proxmox VE Helper Scripts" --title "SELECT OS" --radiolist \
-    "Choose Operating System for NetBird Server VM" 14 68 3 \
+    "Choose Operating System for NetBird Server VM" 15 68 4 \
     "debian13" "Debian 13 (Trixie) - Latest" ON \
     "debian12" "Debian 12 (Bookworm) - Stable" OFF \
+    "ubuntu2604" "Ubuntu 26.04 LTS (Resolute)" OFF \
     "ubuntu2404" "Ubuntu 24.04 LTS (Noble)" OFF \
     3>&1 1>&2 2>&3); then
     exit_script
@@ -148,14 +149,20 @@ function select_os() {
     OS_CODENAME="bookworm"
     OS_DISPLAY="Debian 12 (Bookworm)"
     ;;
+  ubuntu2604)
+    OS_TYPE="ubuntu"
+    OS_VERSION="26.04"
+    OS_CODENAME="resolute"
+    OS_DISPLAY="Ubuntu 26.04 LTS"
+    ;;
   ubuntu2404)
     OS_TYPE="ubuntu"
     OS_VERSION="24.04"
     OS_CODENAME="noble"
     OS_DISPLAY="Ubuntu 24.04 LTS"
     ;;
   *)
-    msg_error "Unsupported OS '${OS_CHOICE}' (expected debian13, debian12 or ubuntu2404)"
+    msg_error "Unsupported OS '${OS_CHOICE}' (expected debian13, debian12, ubuntu2604 or ubuntu2404)"
     exit 1
     ;;
   esac