at command is not executed

Question

I am trying to make the at bash command to run, but it is not working for me. I can add a job to the queue, but it is not run when the time is up. What am I doi

Answer 1

To analyze at(d) execution problems it may help to

1. Check /etc/at.allow and /etc/at.deny for existance and contents (see man at.allow)
2. Check owner and access rights of the atd spool directory (/var/spool/cron/atjobs, daemon:daemon, 770 on Ubuntu)
3. Check if atd daemon is running (systemctrl -a | grep atd on Ubuntu)
4. tail -f /var/log/syslog (at execution time)
5. journalctl -b | grep atd (found that here, contains further hints)

The "Permission denied" error may also be caused by limited number of logins defined (for the at running user) in /etc/security/limits.conf.