[Agent] [Executor] fix bugs

agent-go/executor/BasicFunction.go

@@ -15,7 +15,7 @@ func BasicCommandExists(commandName string) bool {
 	cmd := exec.Command("command", "-v", commandName)
 	err := cmd.Run()
 	if err != nil {
-		log.DebugF("指令 %s 不存在", commandName)
+		log.DebugF("指令 %s 不存在 => %s", commandName, err.Error())
 		return false
 	} else {
 		return true