Cron Log Error
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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 server. Where is the cron log in Ubuntu Linux 12.04/14.04 LTS server? How do I cron error log ubuntu check cron logs in Ubuntu server? How to check if crond server is enabled
Cron Tutorial
and/or is running properly on Ubuntu Linux server? You can use the following command to check crond and cron logs.
Is crontab error log crond (cron server) running?Use the pgrep 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 linux cron error log 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 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 REGULARCron Error Log Location
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/running, process 4004 cron stop/waiting cron start/running, process 4014Now, where are cron errors logged in Ubuntu LTS server?You need to view /var/log/cron.log file using the grep or tail command: $ sudo grep something /var/log/cron.log
$ sudo more /var/log/cron.log
$ sudo tail -f /var/log/cron.log
$ sudo egrep -i 'error|log' /var/log/cron.log
$ sudo tail -F /var/log/cron.log Sample outputs from my log file:Jan 17 18:29:27 planetvenus cron[3988]: (CRON) INFO (Skipping @reboot jobs -- not system startup) Jan 17 18:34:25 planetvenus cron[4013]: (CRON) INFO (pidfile fd = 3) Jan 17 18:
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it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Where is the cron / crontab log? up vote 375 down vote favorite 106 I want to verify if http://www.cyberciti.biz/faq/how-to-check-cron-logs-in-ubuntu-linux/ my cron job is executing and what time. I believe there is a log for my sudo crontab -e jobs, but where? I searched google and it I found references to look in /var/log (which I do not see anything with 'cron') and to edit the file /etc/syslog.conf which I also do not have. ? cron log crontab share|improve this question edited Aug 11 '11 at 14:11 Jorge Castro 24k91386589 asked Aug 11 '11 at 12:06 Scott Szretter 2,015397 add a http://askubuntu.com/questions/56683/where-is-the-cron-crontab-log comment| 5 Answers 5 active oldest votes up vote 428 down vote On a default installation the cron jobs get logged to /var/log/syslog You can see just cron jobs in that logfile by running grep CRON /var/log/syslog If you haven't reconfigured anything,the entries will be in there. share|improve this answer edited Aug 16 '12 at 10:27 user76204 answered Aug 12 '11 at 10:58 Richard Holloway 14.9k43449 16 If there is no MTA installed, cron just throws the job output away. –Barry Kelly Nov 18 '13 at 23:19 1 The cron log may be in another file in the /var/log/ directory. Check for cron.log or equivalent. –Navigatron Jan 31 '14 at 10:21 use journalctl | grep cron on systemd systems –Student Nov 12 '14 at 19:57 this doesn't give me output from the job. it just gives a generic message that the cron was processed. –chovy Dec 12 '15 at 0:34 I have no MTA installed, but the output is saved to /var/log/syslog. It rotates daily. –springloaded Aug 27 at 22:16 | show 1 more comment up vote 125 down vote You can create a cron.log file to contain just the CRON entries that show up in syslog. Note that CRON jobs will still show up in syslog if you follow the following directions. Open the file /etc/rsyslog.d/50-default.conf Find the line that starts with: #cron.* uncomment that line, save the file, and restart rsy
it daily. How do I verify whether the backup cron script job ran successfully? Also, I have http://www.thegeekstuff.com/2012/07/crontab-log/ several echo statements inside my backup.sh shell script. How do I save the output of my script to a log file when it is executed as a cron job? Answer: https://github.com/javan/whenever/wiki/Output-redirection-aka-logging-your-cron-jobs Let us say that you've added the backup.sh to your crontab as shown below to execute it at midnight every day. $ crontab -e 59 23 * * * error log /home/john/bin/backup.sh To verify whether the this job got executed successfully or not, check the /var/log/cron file, which contains information about all the cron jobs that gets executed in your system. As you see from the following output, john's cron job got executed succesfully. $ tail /var/log/cron Oct 8 22:00:00 dev-db crond[18340]: (root) CMD (/bin/sh /home/root/bin/system_check &) Oct 8 23:00:00 dev-db cron error log crond[20348]: (oracle) CMD (/bin/sh /home/oracle/bin/cleanup.sh &) Oct 8 23:59:00 dev-db crond[20399]: (john) CMD (/bin/sh /home/john/bin/backup.sh &) Cron log contains the following information: Timestamp - The date and time when the cron job was executed Hostname - The hostname of the server (For example, dev-db) The cron deamon name and the PID. For example, crond[20399] Username - The username under which this cron job got executed. For example, john. CMD - Anything following this is the real command that got executed at that time. If there are any echo statements inside the backup.sh, you might want to log those into a file. In general, if the backup.sh cron script throws any output (including errors), you might want to log those to a log file. To do this, modify the crontab entry and add the output and error redirection as shown below. $ crontab -e 59 23 * * * /home/john/bin/backup.sh > /home/john/logs/backup.log 2>&1 In the above: > /home/john/logs/backup.log indicates that the standard output of the backup.sh script will be redirected to the backup.log file. 2>&1 indicates that the
Support Search GitHub This repository Watch 124 Star 6,652 Fork 612 javan/whenever Code Issues 32 Pull requests 22 Projects 0 Wiki Pulse Graphs Output redirection aka logging your cron jobs Cheng Zheng edited this page Jul 31, 2016 · 6 revisions Pages 10 Home Adding jobs to another users crontab Exclusive cron task lock with flock Output redirection aka logging your cron jobs People using Whenever RVM Notes Sending Emails Setting variables on the fly Troubleshooting Using Whenever on AWS Elastic Beanstalk Clone this wiki locally Clone in Desktop In your schedule.rb file you can specify the redirection options for your commands at a global or command level by setting the 'output' variable. This example is global level: # adds ">> /path/to/file.log 2>&1" to all commands set :output, '/path/to/file.log' and you should put this global level set :output above your job definition, otherwise it wouldn't work Example: # This work set :output, {:error => '~/Desktop/z.error.log', :standard => '~/Desktop/z.standard.log'} every 1.minute do command "python ~/Desktop/whe/config/z.py" end every 1.minute do command "python ~/Desktop/whe/config/z.py" end # This won't work set :output, {:error => '~/Desktop/z.error.log', :standard => '~/Desktop/z.standard.log'} Rails.root and RAILS_ROOT will be unavailable, however Whenever.path (or just path) will deliver the Rails root path in most cases. Alternatively, if you want to access environment or application config values, simply add # makes Rails.root as well as other environment specific Rails.application.config values available require File.expand_path(File.dirname(__FILE__) + "/environment") Or you can STDOUT and STDERR separately, # adds ">> cron.log 2> error.log" to all commands set :output, {:error => 'error.log', :standard => 'cron.log'} # adds ">> cron.log" to all commands set :output, {:standard => 'cron.log'} # adds "2> error.log" to all commands set :output, {:error => 'error.log'} Additionally you can set these values at the command level, every 3.hours do runner "MyModel.some_process", :output => 'cron.log' rake "my:rake:task", :output => {:error => 'error.log', :standard => 'cron.log'} command "/usr/bin/cmd" end If you need to pipe output into a command, e.g. syslog (logger), use a lambda: set :output, lambda { "2>&1 | logger -t whenever_cron" } In all cases you can if you explicitly set the value of any output to 'nil' it will add a redirect to /dev/null # adds ">> /dev/null 2>&1" to all commands set :output, nil set :output, {:error => nil, :standard => nil} #