Diff files with the Linux diff command
diffprovidestwooutputformatsthatshowcontextaroundthedifferinglines:contextformatandunifiedformat.,Theunifiedoutputformatisavariationonthecontextformatthatismorecompactbecauseitomitsredundantcontextlines.,ADIFFfileisasinglefileshowingthedifference...。參考影片的文章的如下: