I was running into an issue after upgrading from 14.04 to 16.04.
Following an answer, I ran in the root shell:
apt-get remove plymouth
Yet cryptsetup requires plymouth and it would have been unitalled as well, which is why I got a scary notice:
This system has unlocked dm-crypt devices: sda5_crypt
If these devices are managed with cryptsetup, you might be unable to lock the devices after the package removal, though other tools can be used for managing dm-crypt devices. Any system shutdown or reboot will lock the devices.
Do not choose this option if you want to lock the dm-crypt devices before package removal.
Continue with cryptsetup removal?
I hit "no", yet it was still uninstalled.
So I quickly re-installed plymouth
apt-get install plymouth
praying that I still could unlock my disk after reboot, which I could. (And it turns out removing plymouth wasn't needed to fix my problem.)
Yet I am having trouble understanding the meaning of the prompt.
- Could I have safely uninstalled plymouth and still access my fully encrypted disk on boot?
- How is locking the device a bad/good thing?
- What would have happened on reboot if I had kept it uinstalled?
- What would have hitting
yeshave done?
What exactly is the point of the message?
