fix some test findings

_install_skripte/nextcloud.sh

@@ -1,8 +1,9 @@
+#!/bin/bash
 
 retry() {
     local N=$1; shift
     local t=$2; shift
-    for i in $(seq 1 $N); do
+    for _ in $(seq 1 $N); do
         "$@" && return 0 || sleep $t
     done
     return 1