Unix or Linux command to compare binary files

Linux 遇到兩個Binary 檔案，想要比較看看有什麼不一樣，要怎麼做呢？ Linux 如何做Binary 檔案的Diff. 最基本想要知道有沒有不同，只要做diff 即可。

The diff command is for comparing text files. It is not suitable for comparing binary programs. Btw. I don't know what a class file is.

The standard unix diff will show if the files are the same or not: [me@host ~]$ diff 1.bin 2.bin Binary files 1.bin and 2.bin differ.

For arbitrary binaries, of course it makes sense to use a general purpose tool: xdelta; bspatch; rdiff-backup (rsync); git diff.

I need to compare two binary files and get the output in the form <fileoffset-hex> <file1-byte-hex> <file2-byte-hex> for every different byte.

It supports several types of diffing, including 1:1 binary diffing, delta diffing, code analysis diffing, and binary data (bindata) diffing.

Calculating and storing a diff of the abc and abc2 files can be done with rsync. This is an example with abc and abc2 being 153 MB.

To compare subdirectories and any files they may contain as well, use diff -r. Combine it with -q to suppress the output for text files.

In this article, we'll talk about different ways to compare binary files in Linux. We may need this when investigating different files for data recovery.

Use the --binary option to force diff to read and write binary data instead. This option has no effect on a POSIX-compliant system like GNU or traditional Unix.