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Create named LUKS encrypted volume

Terminal - Create named LUKS encrypted volume
edrv() { N=${1:-edrv}; truncate -s ${2:-256m} $N.img && L=$(losetup -f) && losetup $L $N.img && cryptsetup luksFormat --batch-mode $L && cryptsetup luksOpen $L $N && mkfs.vfat /dev/mapper/$N -n $N; cryptsetup luksClose $N; echo losetup -d $L to unmount; }
2014-02-24 01:38:21
User: snipertyler
Functions: echo losetup
Create named LUKS encrypted volume

You need to be root to do this. So check the command before running it.

You enter the same password for

Enter LUKS passphrase:

Verify passphrase:

Enter passphrase for /dev/loopn:


You can then copy the .img file to somewhere else.

Loop it it with losetup -f IMAGENAME.img and then mount it with a file manager (eg nemo) or run mount /dev/loopn /media/mountfolder

Acts similar to a mounted flash drive


There are 9 alternatives - vote for the best!

Terminal - Alternatives

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What others think


A few things I'd improve on.

You use dd to create a sparse file, but truncate would be better:

Besides, your file is 256MiB + 1 byte long. Urgh!

truncate -s 256m

If you're likely to fill the container, then a better bet would be fallocate.

ext4 and btrfs support fallocate which will near-instantly allocate a contiguous block of space.

fallocate -l 256m

Next, I'd add a second parameter to control the size. This is very simple to do, using a defaulting variable


If $2 exists use it, otherwise use the number 256, e.g.

fallocate -l ${2:-256}m $1

Unless Luks is supported by Windows (I haven't checked, but I'd be surprised if it were),

I'd put a REAL filesystem inside the container:

mke2fs -t ext4

Finally, I'd do something about the passwords. I don't want to type them in three times.

A quick idea might be to turn on cryptsetup's batch mode

cryptsetup luksFormat --batch-mode
Comment by flatcap 216 weeks and 6 days ago

I liked a lot of what you suggested & changed it.

For the purposes of combatibility (there is a third party windows program that can open luks I believe) I left it FAT. In *nix only, I would do that (and personally will)

Comment by snipertyler 216 weeks and 6 days ago


Comment by flatcap 216 weeks and 5 days ago

Your point of view

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