I installed Moodle (web based content management system) a couple of days ago. Yesterday I added cron.php in /var/spool/cron/tabs/ ). I also put it into crontab.
0-59 * * * * /usr/bin/php /srv/www/htdocs/moodle/admin/cli/cron.php >/dev/null
Now Thunderbird, the mail program, will restart every 4 min 54 sec and it starts on login.
I have removed the line in crontab and removed the cron job in /var/spool/cron/tabs/ and restarted.
I don’t know how to troubleshoot this.
Any help appreciated.