Error Log Cron Job
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Cron Job Log To File
Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Where are cron errors logged? up vote 71 down vote favorite 11 If I setup cron jobs incorrectly they appear to silently fail. Where should I look for an error log to understand what went wrong? cron scheduling logs share|improve this question edited May 4 '13 at cron job logs in linux 20:26 Anthon 47.5k1462125 asked Aug 11 '10 at 2:19 Brian Lyttle 511169 add a comment| 8 Answers 8 active oldest votes up vote 62 down vote As others have pointed out, cron will email you the output of any program it runs (if there is any output). So, if you don't get any output, there are basically three possibilities: crond could not even start a shell for running the program or sending email crond had troubles mailing the output, or the mail was lost. the program did not produce any output (including error messages) Case 1. is very unlikely, but something should have been written in the cron logs. Cron has an own reserved syslog facility, so you should have a look into /etc/syslog.conf (or the equivalent file in your distro) to see where messages of facility cron are sent. Popular destinations include /var/log/cron, /var/log/messages and /var/log/syslog. In case 2., you should inspect the mailer daemon logs: messages from the Cron daemon usually appear as from root@yourhost. You can use a MAILTO=... line in the crontab file to have cron send email to a specific address, which should make it easier to grep the mailer daemon logs.
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January 17, 2016 in Debian / Ubuntu, Troubleshooting, Ubuntu LinuxI am trying to find errors or message for my cron job on Ubuntu Linux http://www.cyberciti.biz/faq/how-to-check-cron-logs-in-ubuntu-linux/ server. Where is the cron log in Ubuntu Linux 12.04/14.04 LTS server? How do I check cron logs in Ubuntu server? How to check if crond server is enabled and/or is running properly on Ubuntu Linux server? You can use the following command to check crond and cron logs.
Is crond (cron server) running?Use the pgrep cron job or ps command as follows to verify that crond is running:pgrep cron ps aux | grep cron sudo service cron status sudo status cronSample outputs:Fig.01: Is cron service running on Debian or Ubuntu Linux? You can check /var/log/syslog file to find out if cron service running or not using the grep command as follows: $ sudo cron error log grep --color -i cron /var/log/syslog Sample outputs:Jan 17 17:43:21 planetvenus cron[229]: (CRON) INFO (pidfile fd = 3) Jan 17 17:43:21 planetvenus cron[240]: (CRON) STARTUP (fork ok) Jan 17 17:43:21 planetvenus cron[240]: (CRON) INFO (Running @reboot jobs) Jan 17 18:01:01 planetvenus cron[240]: (*system*cache) NOT A REGULAR FILE (/etc/cron.d/cache) Jan 17 18:01:01 planetvenus cron[240]: (*system*output) NOT A REGULAR FILE (/etc/cron.d/output) Jan 17 18:11:45 planetvenus root: cronplanet Jan 17 18:12:11 planetvenus root: cronplanet Jan 17 18:17:01 planetvenus CRON[3911]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly) Jan 17 18:23:31 planetvenus cron[3927]: (CRON) INFO (pidfile fd = 3)Where are cron logs stored on Ubuntu Linux?The logs are stored in /var/log/cron.log file. You need to configured it as follows. Edit /etc/rsyslog.d/50-default.conf file using a text editor such as vi or nano: $ sudo vi /etc/rsyslog.d/50-default.conf OR $ sudo nano /etc/rsyslog.d/50-default.conf Find the line:#cron.* /var/log/cron.logUncoment the line (i.e. remove #):cron.* /var/log/cron.logRestart the following two services: $ sudo service rsyslog restart$ sudo service cron restart Sample outputs:rsyslog stop/waiting rsyslog start/run