root@ubuntu:/# sudo dpkg-reconfigure lvm2
update-initramfs: deferring update (trigger activated)
Processing triggers for initramfs-tools (0.103ubuntu4.2) ...
update-initramfs: Generating /boot/initrd.img-3.13.0-57-generic
cryptsetup: WARNING: invalid line in /etc/crypttab for luks-6752d34f-119e-4321-814e-65910e44627a - 
Attempt to free unreferenced scalar: SV 0x18b8590, Perl interpreter: 0x100a010 at /usr/share/perl5/Debconf/DbDriver.pm line 42, <DEBCONF_CONFIG> chunk 6.
root@ubuntu:/#