diff --git a/main.cpp b/main.cpp
index 1535608..e9d3300 100644
--- a/main.cpp
+++ b/main.cpp
@@ -684,7 +684,7 @@ void exec(unsigned short threadId, string cmd, bool debug)
                debugErrFilePath = debugCommonFilePath + ".err";
         cmd += " >> " + debugOutFilePath;
         cmd += " 2>> " + debugErrFilePath;
-        cmd += "; echo \"" + initialCmd + "\" | tee -a " + debugOutFilePath + " " + debugErrFilePath;
+        cmd += "; echo \"" + initialCmd + "\" | tee -a " + debugOutFilePath + " " + debugErrFilePath + " > /dev/null";
     }
     system(cmd.c_str());
 }