![]() diff Syntax (with Options)ĭiff options add more functionality to commands. In this example, the command would compare file1.html and file2.html and output the differences into the command line. A basic diff command without options may look something like this: diff file1.html file2.html Be sure to include the file extensions with the file names. Replace and with the actual names of the files. ![]() There are also options to add more functionality to a command. This command sets up the basic structure for comparing one file to another. The basic diff syntax looks like this: diff For example, if you have an original file, then make some changes and save it under another name, you could compare the two using diff.ĭiff is used in the command line. What is diff?ĭiff is a way to compare files for differences (hence the name "diff") from the command line. However, in many cases, you can still safely use patch to apply the vendor's changes from the most recent version without losing your own changes. Copying the vendor's new configuration over your version will lose your changes. Reason 3: You can apply patches to files that don't perfectly match the original file used in diff.įor example, if you use a CMS with a configuration file, and make local modifications to that configuration file, you want to preserve those local changes when you upgrade your CMS. ![]() This can be beneficial in cases when the files being patched are large, but the number of changes is relatively small: transferring a patch file is more efficient than transferring the entire file. Reason 2 : Sometimes you can get patches from third parties and apply them to your files. Reason 1 : diff can be useful by itself to see what has changed between files, even if you never use patch. wav files, don’t work well with diff and patch. Files that are binary or manipulated by purpose-built applications, like. Diff and patch are intended to be used on text files. ![]()
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