On Mon, Feb 10, 2014 at 5:30 PM, <dteske at freebsd.org> wrote: > sh -c 'echo "$((($(date +%M)+2)%60)) $(date +%H) * * * root sh > /tmp/do_it_now.sh" >> /etc/crontab' Sounds to me a little too dangerous: what if you forget to remove the entry from crontab? Why not using at and/or a sleep+nohup to launch the job after a few seconds? Luca