diff --git a/src/Pacserver/Pacserver.cs b/src/Pacserver/Pacserver.cs
index 985bc11..c5e7e48 100644
--- a/src/Pacserver/Pacserver.cs
+++ b/src/Pacserver/Pacserver.cs
@@ -93,6 +93,24 @@ public class PacserverUtils {
         }
     }
 
+    public List<String> databasesToTransfer = new List<String>();
+    public void filterDiffOutputForDatabases() {
+        foreach (string database in diffOfPackagesOrDatabases) {
+            databasesToTransfer.Add(getDatabaseFromRegex(database, @"\/(?:[\w.-]+\/)*[\w.-]+(?:\.\w+)*\/*db")); // https://regex101.com/r/Wm5M0P/1
+        }
+    }
+
+    public string getDatabaseFromRegex(string input, string pattern) {
+        string match = string.Empty;
+        MatchCollection matchCollection = Regex.Matches(input, pattern);
+
+        foreach (Match matches in matchCollection) {
+            match = matches.Value;
+        }
+
+        return match;
+    }
+
     private static List<String> newerPackagesAndDatabases = new List<String>();
     public async void transferPacmanCache() {
         HttpClient client = new HttpClient();
diff --git a/src/Pacserver/Program.cs b/src/Pacserver/Program.cs
index e549736..0c750e2 100644
--- a/src/Pacserver/Program.cs
+++ b/src/Pacserver/Program.cs
@@ -6,7 +6,7 @@ public class Program {
             Console.ForegroundColor = ConsoleColor.Red;
             Console.WriteLine("Please specify an option.");
             Console.ResetColor();
-            Console.WriteLine("Possible options are: determinePacmanCacheDirectory, packagesBefore, packagesAfter, diffPackages, databasesBefore, databasesAfter, diffDatabases");
+            Console.WriteLine("Possible options are: determinePacmanCacheDirectory, packagesBefore, packagesAfter, diffPackages, databasesBefore, databasesAfter, diffDatabases, filter");
             return;
         }
 
@@ -27,7 +27,7 @@ public class Program {
                 break;
             case "diffPackages":
                 utils.diff("/tmp/before_update.txt", "/tmp/after_update.txt");
-                string packages = string.Join(",", utils.diffOfPackagesOrDatabases);
+                string packages = string.Join("\n", utils.diffOfPackagesOrDatabases);
                 Console.WriteLine(packages);
                 break;
             case "databasesBefore":
@@ -40,14 +40,20 @@ public class Program {
                 break;
             case "diffDatabases":
                 utils.diff("/tmp/databases_before.txt", "/tmp/databases_after.txt");
-                string databases = string.Join(",", utils.diffOfPackagesOrDatabases);
+                string databases = string.Join("\n", utils.diffOfPackagesOrDatabases);
                 Console.WriteLine(databases);
                 break;
+            case "filter":
+                utils.diff("/tmp/databases_before.txt", "/tmp/databases_after.txt");
+                utils.filterDiffOutputForDatabases();
+                string filteredDatabases = string.Join("\n", utils.databasesToTransfer);
+                Console.WriteLine(filteredDatabases);
+                break;
             default:
                 Console.ForegroundColor = ConsoleColor.Red;
                 Console.WriteLine(args[0] + " is not a recognized option.");
                 Console.ResetColor();
-                Console.WriteLine("Possible options are: determinePacmanCacheDirectory");
+                Console.WriteLine("Possible options are: determinePacmanCacheDirectory, packagesBefore, packagesAfter, diffPackages, databasesBefore, databasesAfter, diffDatabases, filter");
                 break;
         }
     }