diff --git a/Sync/main.cpp b/Sync/main.cpp
index b07213e..0a28a1e 100644
--- a/Sync/main.cpp
+++ b/Sync/main.cpp
@@ -26,11 +26,69 @@ int main(int argc, char **argv) {
     QCoreApplication::setApplicationName("ATBUpdateSync");
     QCoreApplication::setApplicationVersion(APP_VERSION);
 
+    QDebug debug = qCritical();
+
     if (!messageHandlerInstalled()) { // change internal qt-QDebug-handling
         atbInstallMessageHandler(nullptr);
         //atbInstallMessageHandler(atbDebugOutput);
         setDebugLevel(LOG_NOTICE);
     }
 
-    return 0;
+    if (internal::customerRepoExists() == false) {
+        qCritical().noquote() << internal::NO_CUSTOMER_REPOSITORY;
+        return internal::NO_CUSTOMER_REPOSITORY_CODE;
+    }
+
+    QString const crd = internal::customerRepoDir();
+    QString const etcInRepo = QDir::cleanPath(crd + QDir::separator() + "etc/");
+    QString const optInRepo = QDir::cleanPath(crd + QDir::separator() + "opt/");
+
+    if (!QDir(etcInRepo).exists()) {
+        qCritical().noquote() << internal::NO_ETC_CUSTOMER_REPOSITORY;
+        return internal::NO_ETC_CUSTOMER_REPOSITORY_CODE;
+    }
+
+    if (!QDir(optInRepo).exists()) {
+        qCritical().noquote() << internal::NO_OPT_CUSTOMER_REPOSITORY;
+        return internal::NO_OPT_CUSTOMER_REPOSITORY_CODE;
+    }
+
+#if 0
+    error codes for rsync:
+        https://stackoverflow.com/questions/20737204/comprehensive-list-of-rsync-error-codes
+
+     0     Success
+     1     Syntax or usage error
+     2     Protocol incompatibility
+     3     Errors selecting input/output files, dirs
+     4     Requested action not supported: an attempt was made to manipulate 64-bit
+           files on a platform that cannot support them; or an option was specified
+           that is supported by the client and not by the server.
+     5     Error starting client-server protocol
+     6     Daemon unable to append to log-file
+    10     Error in socket I/O
+    11     Error in file I/O
+    12     Error in rsync protocol data stream
+    13     Errors with program diagnostics
+    14     Error in IPC code
+    20     Received SIGUSR1 or SIGINT
+    21     Some error returned by waitpid()
+    22     Error allocating core memory buffers
+    23     Partial transfer due to error
+    24     Partial transfer due to vanished source files
+    25     The --max-delete limit stopped deletions
+    30     Timeout in data send/receive
+    35     Timeout waiting for daemon connection
+#endif
+
+
+    QStringList options({"-v", "--recursive", "--progress", "--checksum",
+                         "--exclude=.*", "--include=*.bin", "--include=*.json",
+                         "--include=*.ini"});
+    int ret = SyncCommand().exec("rsync", options << etcInRepo << "/etc");
+
+    if (ret == 0) {
+       ret = SyncCommand().exec("rsync", options << optInRepo << "/opt");
+    }
+    return ret;
 }
diff --git a/Sync/sync_command.cpp b/Sync/sync_command.cpp
index 644d3d5..ff97448 100644
--- a/Sync/sync_command.cpp
+++ b/Sync/sync_command.cpp
@@ -12,7 +12,10 @@ using namespace internal;
 SyncCommand::SyncCommand() {
 }
 
-bool SyncCommand::exec(QString const &cmd, QStringList const &options,
+int SyncCommand::exec(QString const &cmd, QStringList const &options,
                        int start_timeout, int finish_timeout) {
-    return false;
+    Command c(cmd, options, internal::customerRepoDir(),
+              start_timeout, finish_timeout);
+    c.exec();
+    return c.exitCode();
 }
diff --git a/Sync/sync_command.h b/Sync/sync_command.h
index 82b416f..17b19d9 100644
--- a/Sync/sync_command.h
+++ b/Sync/sync_command.h
@@ -7,7 +7,7 @@ class SyncCommand {
 public:
     SyncCommand();
 
-    bool exec(QString const &cmd, QStringList const &options,
+    int exec(QString const &cmd, QStringList const &options,
               int start_timeout = 100000, int finish_timeout = 100000);
 };