cryptroot unlock via dropbear

cryptroot

#!/bin/sh
# https://chicagolug.org/news/2015-10-09-remotely-unlock-encrypted-server-with-dropbear.html
# Quit the Ubuntu graphical splash screen. This is necessary for cryptroot
#   to work right. The server will fall back to a non-graphical unlock
#   screen.
plymouth --quit
count=0
# Looping gives us some control over the number of unlock attempts.
while ! ( ls /dev/mapper/ | grep root > /dev/null ); do
    if [ $count -gt 0 ]; then
        exit 1
    fi
    sleep 3
    count=$(( count + 1 ))
    # This script detects your encryption and LVM configuration and
    # prompts the user to unlock their encrypted hard disks.
    /scripts/local-top/cryptroot
done
# Kill these programs to keep 'init' moving.
if ( ps | grep cryptsetup | grep askpass > /dev/null ); then
    kill -9 $(ps | grep cryptsetup | grep askpass | awk '{print $1}')
fi
if ( ps | grep /bin/sh | grep "sh -i" > /dev/null ); then
    kill -9 $(ps | grep /bin/sh | grep "sh -i" | awk '{print $1}')
fi