diff --git a/update.php b/update.php
index 3b1cf29..2c9e4ea 100644
--- a/update.php
+++ b/update.php
@@ -22,6 +22,35 @@ if (php_sapi_name() !== 'cli') exit;
 
 require_once('oai2config.php');
 
+/**
+ * Format output string
+ *
+ * @param string $text
+ * @param string $format 'green' or 'red'
+ *
+ * @return string
+ */
+function format($text, $format = '') {
+
+    switch ($format) {
+
+        case 'green':
+            $text = "\033[0;92m$text\033[0m";
+            break;
+
+        case 'red':
+            $text = "\033[1;91m$text\033[0m";
+            break;
+
+        default:
+            break;
+
+    }
+
+    return $text;
+
+}
+
 // Check mandatory cli arguments
 if (empty($argc) || $argc != 3) {
 
@@ -48,8 +77,6 @@ if (empty($config['metadataFormats'][$metadataPrefix])) {
 }
 
 // Check sourceDir permissions
-$sourceDir = rtrim($sourceDir, '/').'/';
-
 if (!is_dir($sourceDir) || !is_readable($sourceDir)) {
 
     echo "Error: $sourceDir not readable\n";
@@ -58,6 +85,8 @@ if (!is_dir($sourceDir) || !is_readable($sourceDir)) {
 
 }
 
+$sourceDir = rtrim($sourceDir, '/').'/';
+
 // Check dataDir permissions
 $dataDir = rtrim($config['dataDirectory'], '/').'/'.$metadataPrefix.'/';
 
@@ -74,6 +103,8 @@ echo "Updating $dataDir from $sourceDir\n";
 
 $todo = array ();
 
+$error = false;
+
 $oldFiles = glob($dataDir.'*.xml');
 
 foreach ($oldFiles as $oldFile) {
@@ -92,44 +123,64 @@ foreach ($newFiles as $newFile) {
 
 foreach ($todo as $identifier => $task) {
 
+    echo "  Checking record $identifier ... ";
+
     if ($task === 'update') {
 
         if (md5_file($sourceDir.$identifier.'.xml') !== md5_file($dataDir.$identifier.'.xml')) {
 
-            echo "  Updating record $identifier ...";
-
             // Replace file
             if (copy($sourceDir.$identifier.'.xml', $dataDir.$identifier.'.xml')) {
 
-                echo " done!\n";
+                echo format('updated', 'green')."\n";
 
             } else {
 
-                echo " failed!\n";
+                echo format('update failed', 'red')."\n";
+
+                $error = true;
 
             }
 
+        } else {
+
+            echo "unchanged\n";
+
         }
 
     } elseif ($task === 'delete') {
 
         if (filesize($dataDir.$identifier.'.xml') !== 0) {
 
-            echo "  Deleting record $identifier ...";
-
             // Truncate file
             if (fclose(fopen($dataDir.$identifier.'.xml', 'w'))) {
 
-                echo " done!\n";
+                echo format('deleted', 'green')."\n";
 
             } else {
 
-                echo " failed!\n";
+                echo format('deletion failed', 'red')."\n";
+
+                $error = true;
 
             }
 
+        } else {
+
+            echo "unchanged\n";
+
         }
 
     }
 
 }
+
+if ($error) {
+
+    echo "Update completed, but errors occurred. Please check the logs!\n";
+
+} else {
+
+    echo "Update successfully completed!\n";
+
+}