Checksum Arcanius

Based on an answer on serverfault, but modified to work on linux:

Use this one-liner to get the bash and sshd processes currently hanging onto the old screen.

ps aux | grep $(ps aux | grep [s]creen | grep -o 'pts[^ ]*') | grep 'sshd\|bash'

Kill these processes and screen is recoverable before the long and arbitrary timeout.