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How to set up encryption space in encrypted drive?

What I have:

  • Notebook (LUKS encrypted)
  • External hard disk (LUKS encrypted)

The idea is that when I mount my external disk to access "everyday data" on it, I don't necessarily give access to the more sensitive data inside of it.

I was wondering if it is possible to create an additional (for example 5GB) encrypted space (maybe password+key) inside of the encrypted drive for more sensitive content? What is the best way to do it? I'm looking for native linux tools, not true-/veracrypt or the likes.

Additional question:

I once heared about a patch for LUKS that erases your entire drive if you enter a special password instead of the real password, did it ever land in the main branch?

How to set up encryption space in encrypted drive?

What I have:

  • Notebook (LUKS encrypted)
  • External hard disk (LUKS encrypted)

The idea is that when I mount my external disk to access "everyday data" on it, I don't necessarily give access to the more sensitive data inside of it.

I was wondering if it is possible to create an additional (for example 5GB) encrypted space (maybe password+key) inside of the encrypted drive for more sensitive content? What is the best way to do it? I'm looking for native linux tools, not true-/veracrypt or the likes.

Additional question:

I once heared about a patch for LUKS that erases your entire drive if you enter a special password instead of the real password, did it ever land in the main branch?