The * indicates that all of the lines from 0000030 to 0001020 inclusive would be the same value as the 0000020 line and that keeps the output condensed for large files with long and aligned repeating sequences. The first number on each line is the starting offset in the file for the first of the 8 following values on that line. What you are seeing there is the binary contents of the mydata file shown as lines of 8 individual 16-bit values in hexadecimal. I no longer know where I am in the file.Put it in a shell script with some layout.Splitting out individual elements of the structured data.Example dumping a partition table using hexdump.In truth it isn’t really difficult to understand but without an example to use while reading the documentation it may not be obvious how the formatting options are applied. I found hexdump syntax difficult and I am a C programmer. Part of the format syntax is pretty much the same as a commonly used function in the C programming language. If you’ve used the hexdump man page then you may have found the formatting syntax quite intimidating. hexdump is very versatile and allows you to look at the structure inside binary files as you see fit and once you learn how to use it you can apply it quickly to many problems. One way (of many) to solve that is to use the hexdump utility. I often work with binary data that has a format I could interpret if only I could see it in a human readable form.
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