logic changes

mariadbinstall

@@ -86,6 +86,17 @@ done
 #
 if [[ -z "$adminuser" || -z "$adminpwd" ]]; then usage ; printf "\nERROR: Both -u and -p arguments are mandatory!\n\n" ; exit 1 ; fi
 
+
+#
+# Prevent overriding root socket authentication
+#
+if [[ "$adminuser" == "root" ]]; then
+    printf "\nERROR: The root user already exists and uses socket authentication.\n"
+    printf "Do not assign a password to it — this would break socket login.\n"
+    printf "Use a different username (e.g., admin, dbadmin, or anything else).\n\n"
+    exit 1
+fi
+
 #
 # Username: only allow a-zA-Z0-9_.-
 #