Amid the progress in science and technology, the application scenarios of intelligent devices in a power system have been increasing, especially in power automation as well as data acquisition and communication. Many platforms rely on an embedded Linux operating system. An Energy Remote Terminal Unit (ERTU) is taken as an example for analysis. Communication parameters should be preset into the device in the form of configuration files, since ERTU needs to communicate with electric energy meters and supports data calling of different master station systems during operation. If the device fails, the configuration files may require reconfiguration in the subsequent recovery process, increasing the workload and affecting the consistency of parameters. If the automatic backup and restore of configuration files are realized simply and quickly with the script program and external memory in a Linux system, then the workload of field engineering operation and maintenance can be reduced, improving the management level of the whole engineering application.