diff --git a/hub/setup-hub.sh b/hub/setup-hub.sh
index 5afb44e..c6801d1 100644
--- a/hub/setup-hub.sh
+++ b/hub/setup-hub.sh
@@ -78,10 +78,14 @@ else
 
     ADDED_TO_GROUP=false
     if getent group sudo >/dev/null 2>&1; then
-        usermod -aG sudo armbian && ADDED_TO_GROUP=true
+        if usermod -aG sudo armbian 2>/dev/null; then
+            ADDED_TO_GROUP=true
+        fi
     fi
     if [ "$ADDED_TO_GROUP" = false ] && getent group wheel >/dev/null 2>&1; then
-        usermod -aG wheel armbian && ADDED_TO_GROUP=true
+        if usermod -aG wheel armbian 2>/dev/null; then
+            ADDED_TO_GROUP=true
+        fi
     fi
     if [ "$ADDED_TO_GROUP" = false ]; then
         warn "Neither sudo nor wheel group found — armbian user has no sudo access."