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0 pointsdozzie10y ago0 comments

>>> Most distros symlink /bin to /usr/bin.

>> Uhm, no? I've only seen it in recent CentOS (older versions didn't have it), and maybe Fedora does this as well.

> Arch, Ubuntu, Debian all do it.

I haven't checked Arch, but neither Ubuntu 16.04 nor Debian Jessie haven't created /bin as a symlink.

>> You can do it [restoring execution bit on /bin/chmod] in any number of ways [...]

> Only the last one is a clever solution

On interview you don't need to have the most clever answer. It's better to show you understand the mechanisms underneath by having several sensible ways.

> What do you mean? They didn't know there's a copy of the same binary?

No, I meant this: https://news.ycombinator.com/item?id=11627670

And there is no copy of the same binary.

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cyphar10y ago

> I haven't checked Arch, but neither Ubuntu 16.04 nor Debian Jessie haven't created /bin as a symlink.

Odd, I could've sworn they did. I stand corrected.

> > What do you mean? They didn't know there's a copy of the same binary?

> No, I meant this: https://news.ycombinator.com/item?id=11627670

> And there is no copy of the same binary.

That's what I said, you use the ELF interpreter. :P

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