From b5c6742491861b7043483ce88a2b7044740a6ad6 Mon Sep 17 00:00:00 2001
From: "github-actions[bot]"
 <41898282+github-actions[bot]@users.noreply.github.com>
Date: Mon, 7 Sep 2026 10:52:23 +1000
Subject: [PATCH] Clarify supported OS versions for installer (#12803) (#12804)

Fixes #12798

(cherry picked from commit 9bc5054d841fedb1a07eeec0aad2f3bea7d278bc)

Co-authored-by: Matthias Mair <code@mjmair.com>
---
 contrib/installer/src/root_command.sh | 25 ++++++++++++++++++++-----
 docs/docs/start/installer.md          |  4 ++--
 2 files changed, 22 insertions(+), 7 deletions(-)

diff --git a/contrib/installer/src/root_command.sh b/contrib/installer/src/root_command.sh
index 5519d14c1d..7a894b7f8b 100644
--- a/contrib/installer/src/root_command.sh
+++ b/contrib/installer/src/root_command.sh
@@ -46,6 +46,7 @@ echo "### Installer for InvenTree - source: $publisher/$source_url"
 get_distribution
 echo "### Detected distribution: $OS $VER"
 SUPPORTED=true          # is this OS supported?
+OLD_VERSION=false       # is this an old OS that is no longer supported?
 
 DIST_OS=${OS,,}
 DIST_VER=$VER
@@ -54,21 +55,30 @@ case "$OS" in
     Ubuntu)
         if [[ $VER == "24.04" ]]; then
             SUPPORTED=true
-        elif [[ $VER == "22.04" ]]; then
+        elif [[ $VER == "26.04" ]]; then
             SUPPORTED=true
         elif [[ $VER == "20.04" ]]; then
-            SUPPORTED=true
+            SUPPORTED=false
+            OLD_VERSION=true
+        elif [[ $VER == "22.04" ]]; then
+            SUPPORTED=false
+            OLD_VERSION=true
         else
             SUPPORTED=false
         fi
         ;;
     "Debian GNU/Linux" | "debian gnu/linux" | Raspbian)
-        if [[ $VER == "12" ]]; then
+        if [[ $VER == "13" ]]; then
             SUPPORTED=true
+        elif [[ $VER == "12" ]]; then
+            SUPPORTED=false
+            OLD_VERSION=true
         elif [[ $VER == "11" ]]; then
-            SUPPORTED=true
+            SUPPORTED=false
+            OLD_VERSION=true
         elif [[ $VER == "10" ]]; then
-            SUPPORTED=true
+            SUPPORTED=false
+            OLD_VERSION=true
         else
             SUPPORTED=false
         fi
@@ -82,6 +92,11 @@ esac
 
 if [[ $SUPPORTED != "true" ]]; then
     echo "This OS is currently not supported."
+
+    if [[ $OLD_VERSION == "true" ]]; then
+        echo "The detected version ($OS $VER) is no longer supported but a newer version is."
+    fi
+
     echo "Please install manually using https://docs.inventree.org/en/stable/start/install/"
     echo "or check https://github.com/inventree/InvenTree/issues/3836 for packaging for your OS."
     echo "If you think this is a bug please file an issue at"
diff --git a/docs/docs/start/installer.md b/docs/docs/start/installer.md
index 55f367bc90..893a94730e 100644
--- a/docs/docs/start/installer.md
+++ b/docs/docs/start/installer.md
@@ -8,8 +8,8 @@ The InvenTree installer automates the installation procedure for a production In
 
 The installer supports the following Linux distributions:
 
-- Debian 11, 12
-- Ubuntu 22.04 LTS, 24.04 LTS
+- Debian 13
+- Ubuntu 24.04 LTS, 26.04 LTS
 
 Support for other OS versions is not currently planned. If you are using a different distribution, you can still follow the [docker](./docker.md) or [bare metal](./install.md) installation instructions.