Need to cancel a scheduled shutdown

Question

I'm very new to ubuntu. I am trying to cancel a shutdown I accidently put using the command echo "0 3 * * * root /sbin/shutdown -h 5 'system will reboot in 5 minutes'" | sudo tee /etc/cron.d/reboot-at-3am How can I stop this from shutting down. I wanted it to reboot at 3am but it is just shutting down and not restarting.

You will need to edit your reboot-at-3am file to say shutdown -R if you want to reboot. -h means "hard" — , Feb 04 '21 at 23:41
Here's one example of how to edit a text file: https://askubuntu.com/questions/54221/how-to-edit-files-in-a-terminal-with-nano — user535733, Feb 04 '21 at 23:59

score 0 · Answer 1 · answered Feb 04 '21 at 23:41

0

Just run

shutdown -c

to cancel the pending shutdown and correct your command

answered Feb 04 '21 at 23:41

kureikain

101
2

Seems like this would only work during the fraction of a second after cron reads the crontab that minute. Cron doesn't run commands in advance. – user535733 Feb 04 '21 at 23:44
when i try that i get Failed to set wall message, ignoring: Interactive authentication required – Sidewinder Feb 04 '21 at 23:55
@Sidewinder did you run it with sudo or as root? – kureikain Feb 05 '21 at 16:50

Need to cancel a scheduled shutdown

1 Answers1