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Thread: Is there a way to verify that cronjobs are working properly?

  1. #1

    Default Is there a way to verify that cronjobs are working properly?

    I have a web application that I am trying to upgrade. Part of their upgrade process involves using a migration tool to transfer data from one version to another. This tool relies on cronjobs for it to function.

    According to them, the migration is not working because my cronjobs are not working properly.

    Is there a way to verify this?

    Below is what I had to paste in my crontab:

    MAILTO=webmaster@mymailhost.com
    * * * * * cd /srv/www/whiterhino/d7/periodic; /usr/bin/php -q cron.php


    Any ideas?

  2. #2

    Default Re: Is there a way to verify that cronjobs are working properly?

    -----BEGIN PGP SIGNED MESSAGE-----
    Hash: SHA1

    sudo tail -f /var/log/messages

    Watch for any output talking about cron, so I guess you could refine that:

    sudo tail -f /var/log/messages | grep -i cron

    Good luck.





    On 09/06/2010 06:36 PM, abacabb wrote:
    >
    > I have a web application that I am trying to upgrade. Part of their
    > upgrade process involves using a migration tool to transfer data from
    > one version to another. This tool relies on cronjobs for it to
    > function.
    >
    > According to them, the migration is not working because my cronjobs are
    > not working properly.
    >
    > Is there a way to verify this?
    >
    > Below is what I had to paste in my crontab:
    >
    > MAILTO=webmaster@mymailhost.com
    > * * * * * cd /srv/www/whiterhino/d7/periodic; /usr/bin/php -q cron.php
    >
    >
    > Any ideas?
    >
    >

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  3. #3
    Join Date
    Jun 2008
    Location
    Netherlands
    Posts
    25,129

    Default Re: Is there a way to verify that cronjobs are working properly?

    You say ""my crontab" which is not very precise. Normaly this means that you area normal user (not root) and that you put this in your crontab using
    Code:
    crontab -e
    But some people say "my crontab' meaning e.g. root's crontab, or /etc/crontab.
    Henk van Velden

  4. #4

    Default Re: Is there a way to verify that cronjobs are working properly?

    Quote Originally Posted by hcvv View Post
    You say ""my crontab" which is not very precise. Normaly this means that you area normal user (not root) and that you put this in your crontab using
    Code:
    crontab -e
    But some people say "my crontab' meaning e.g. root's crontab, or /etc/crontab.
    yeah I used crontab -e

  5. #5
    Join Date
    Jun 2008
    Location
    Netherlands
    Posts
    25,129

    Default Re: Is there a way to verify that cronjobs are working properly?

    Just an idea, you could add
    Code:
    ; echo "this is cron"
    (or a more usefull outcry) to your cron entry, thus forcing a mail to webmaster@mymailhost.com (I assume that normaly the running does not generate any output to standard out and thus you are wondering if it works).
    Henk van Velden

  6. #6
    Join Date
    Apr 2009
    Location
    Stuttgart, Germany
    Posts
    113

    Default Re: Is there a way to verify that cronjobs are working properly?

    Another solution is to log the output directly to a file:

    * * * * * cd /srv/www/whiterhino/d7/periodic; /usr/bin/php -q cron.php >> /var/log/mylogfile.log 2>&1

    In that case you'll see the content in the file /var/log/mylogfile.log (you need to have write permissions there).

  7. #7
    Join Date
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    Location
    Netherlands
    Posts
    25,129

    Default Re: Is there a way to verify that cronjobs are working properly?

    I would change that into:
    Code:
    * * * * * cd /srv/www/whiterhino/d7/periodic; /usr/bin/php -q cron.php ; echo "cron.php run at $(date)" >>/tmp/mylogfile 2>&1
    then. No intermingling of the "real" output with the "test" output and no need to give write access into a typical "system" place to a normal user.

    But beware: this seems to be run at every minute, thus mylogfile can grow and fill your root partition when you leave the test output adding there for months
    Henk van Velden

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