hpr2791 :: LUKS like truecrypt
Klaatu demonstrates how to use LVM and cryptsetup to create and use portable encrypted filesystems
Hosted by Klaatu on 2019-04-15 is flagged as Clean and is released under a CC-BY-SA license.
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Privacy and Security.
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Create an empty file of a predetermined size:
$ fallocate --length 512M foo.img
Create a LUKS container on it:
$ cryptsetup --verify-passphrase luksFormat foo.img
Set it up:
$ sudo cryptsetup luksOpen foo.img foo
$ ls /dev/mapper
foo
$
Make a file system on it:
$ sudo mkfs.ext2 /dev/mapper/foo
If you don't need it for anything now, you can close it:
$ sudo cryptsetup luksClose foo
$ ls /dev/mapper
$
Mount it as a usable filesystem:
$ sudo mkdir /crypt
$ sudo mount /dev/mapper/foo /crypt
Depending on your system configuration, you may need to set up reasonable permissions:
$ sudo mkdir /crypt/mystuff
$ sudo chown klaatu:users /crypt/mystuff
$ sudo chmod 770 /crypt/mystuff
$ echo "hello world" >> /crypt/mystuff/file.txt
When you're finished using your encrypted vault, unmount and close it:
$ sudo umount /crypt
$ sudo cryptsetup luksClose foo