Linux diff command

The diff command is a very important tool on Linux for comparing the contents of files, especially between two different versions of a file to find changes. Diff prints each line change on the command line. The latest version of diff also supports binaries. The output of the diff program is called a patch, because Linux also has a patch program that updates the contents of the a.c file to b.c based on the output of the diff program. Diff is SVN, CVS, GI...