How to find the difference between two files
diffprovidestwooutputformatsthatshowcontextaroundthedifferinglines:contextformatandunifiedformat.,Theunifiedoutputformatisavariationonthecontextformatthatismorecompactbecauseitomitsredundantcontextlines.,ADIFFfileisasinglefileshowingthedifference...。參考影片的文章的如下: