diff --git a/tinc-debug b/tinc-debug
index a4ee38a..bab88f1 100755
--- a/tinc-debug
+++ b/tinc-debug
@@ -1,14 +1,30 @@
 #!/usr/bin/env bash
 
-set -eu
-
 if [ -z "$BASH" ]; then
   echo "All vpn scripts requires bash!"
   exit 1
 fi
 
+set -eu
+
+die() {
+  echo $1 &>2
+  exit 1
+}
+warn() {
+  echo $1 &>2
+}
+
 DIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
 
+if [ ! -f "$DIR/ed25519_key.priv" ]; then
+  warn "No ed25519_key.priv found!"
+fi
+
+if [ ! -f "$DIR/rsa_key.priv" ]; then
+  warn "No rsa_key.priv found!"
+fi
+
 if [[ $EUID -ne 0 ]]; then
   if has sudo; then
     echo "Start tinc. Cancel with Ctrl+C ..."