And which one do I trust?

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Ah, OK, I got 979453 in du, it's the size of subdirs. 983549 was including current directory.

But it still is strange why Nautilus shows 971.3kB

Either one.

Nautilus gives total size in bytes and correctly calculated the kibibytes.

dh gives the correct amount plus 4069 bytes for the '.' entry. Which is the current directory. The directory (literally a directory) is 4096 bytes.

jlinkels

Does not seem to be so.

* Nautilus gives larger number. So, if anything is including something, it's Nautilus.
* The difference is huge.
- 971.3K - 956.5K = 14.8K
* And, if I play around then, all subdirs 56 * 4096B / 1024 = 224K

Krusader calculates KIBIbytes and Nautilus calculates KILObytes. Hence the difference.

Furthermore I said ONE directory was counted extra in du, not ALL subdirectories.

jlinkels

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Oh wow! I didn't knew, there was such a thing as Kibibyte.
Thanks for clarification!

I believe at one time, a kilobyte was actually considered 1024 bytes. But due to false/simplified advertising of storage media using 1000 instead of 1024, it was causing confusion. So someone suggested using kibi(KiB), mebi(MiB), gibi(GiB), etc. in place of kilo(KB), mega(MB), giga(GB), etc. to show usage of 1024. I myself have always used measurements of 1024 when it comes to the original prefixes.

Do you use that for "kilometers" too? How about a "1 Kilohertz" tone?

The prefix "kilo" had a well defined meaning of "1000" since before computers and memory devices started using it. Then memory chips, built with capacities that are always a power of 2, came along, and "1024" was close enough to "1000" that nobody really cared much about the difference (just 2.4%). But as sizes got larger and larger, additional powers of 1.024 increased the divergence. By the time you get to terabytes (vs. tibibytes) it's a nearly 10% difference, and people are grumbling that their disk drives are smaller than what they thought was advertised.

For anything other than memory chips, there is little reason for the long-established prefixes to be taken as anything other than powers of 10. A kilometer is 1000 meters, "the tone at the time is 1000 cycles" (old joke -- more likely 400 or 440Hz, actually), a 56Kb/s link carries 56,000 bits/second, and a "1 terabyte" disk drive holds 1,000,000,000,000 bytes.

This backs up what I was saying.
http://en.m.wikipedia.org/wiki/Kibibyte

I know that outside of the computer world, kilo always = 1000