Fascinating. I just had to use luksOpen to fix my freshly installed 14.04 ... and I ran into the very same problem: when going for luksClose; I get the "resource busy" error (running the command from a USB stick which contains ubuntu 14.04.2).
Fascinating. I just had to use luksOpen to fix my freshly installed 14.04 ... and I ran into the very same problem: when going for luksClose; I get the "resource busy" error (running the command from a USB stick which contains ubuntu 14.04.2).