Diff command usage

Diff command usage 1. diff-urN old/new/> mysoft. the patch parameter-u indicates that the uniied format is used, and-r indicates that the comparison directory is used.-N indicates that non-existing files are processed as empty files, so that newly added files will also appear in the patch file. Use the following command to apply the patch: patch-p0 <mysoft. patch 2. the diff-y command (the long format is-side-by-side) divides the screen into the left and right parts to compare the differences between the two files.