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Editor to share with you ruh in Linux to identify the same content of the file, I hope you will learn something after reading this article, let's discuss it!

Compare files with the diff command

Perhaps the easiest way to compare two files is to use the diff command. The output will show the differences in your file.

The symbol represents when the parameter is passed in the first

Whether there are additional lines of text in the file In this example, there are additional lines of text in backup.html.

$diff index.html backup.html2438a2439,2441 > > That's all there is to report. >

If diff has no output, it means that the two files are the same.

$diff home.html index.html$

The only drawback of diff is that it can only compare two files at a time and you have to specify which files to compare. Some commands in this post can find multiple duplicate files for you.

Use checksum

The cksum (checksum) command calculates the checksum of the file. A checksum is a mathematical simplification that converts text content into a long number, such as 2819078353 228029. Although checksums are not entirely unique, there is little chance that different checksums will be the same.

$cksum * .html2819078353 228029 backup.html4073570409 227985 home.html4073570409 227985 index.html

In the above example, you can see how the second and third files that produce the same checksum can be defaulted to the same.

Use the find command

Although the find command does not have the option to find duplicate files, it can still be used to find files by name or type and run the cksum command. For example:

$find. -name "* .html"-exec cksum {}\; 4073570409 227985. / home.html2819078353 228029. / backup.html4073570409 227985. / index.html

Use the fslint command

The fslint command can be specifically used to find duplicate files. Notice that we gave it a starting position. If it needs to traverse a considerable number of files, it will take some time to complete. Notice how it lists duplicate files and looks for other problems, such as empty directories and bad ID.

Fslint.-- file name lint--Invalid utf8 names--file case lint- -- DUPlicate files

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