ProFTPD on Ubuntu killed unexpectedly

March 8, 2016

$ sudo nano /etc/init.d/proftpd

Find line:

start-stop-daemon --stop --signal $SIGNAL --quiet --pidfile "$PIDFILE"

and replace to:

start-stop-daemon --stop --signal $SIGNAL --retry 1 --quiet --pidfile "$PIDFILE"

restart proftpd

$ sudo service proftpd restart