fix: check debian linux version in /etc/debian_version

Closes fusioninventory#723

Author: g-bougard

Changes

@@ -43,6 +43,7 @@ inventory:
 * linux: provides debian installed software filesize in bytes
 * linux: Added support for installed softwares by Snap
 * linux: double-check a network interface is not virtual
+* fix #723: check debian linux version in /etc/debian_version
 
 netdiscovery/netinventory:
 * linux: avoid to share HTTP client with threads to fix RHEL/CentOS 7 crash

lib/FusionInventory/Agent/Task/Inventory/Linux/Distro/OSRelease.pm

@@ -30,6 +30,14 @@ sub doInventory {
         OSNAME => $description,
     });
 
+    # Handle Debian case where version is not complete like in Ubuntu
+    # by checking /etc/debian_version
+    if (-r '/etc/debian_version') {
+        my $debian_version = getFirstLine(file => '/etc/debian_version');
+        $version = $debian_version
+            if $debian_version && $debian_version =~ /^\d/;
+    }
+
     $inventory->setOperatingSystem({
         NAME      => $name,
         VERSION   => $version,