Rails - Aug 2012 - [Whenever gem]What is the reason that linux's cron can't automatic running?

OS : Ubuntu 12.04

Now I use Backup <https://github.com/meskyanichi/backup> and
Whenever<https://github.com/javan/whenever> gem
to backup my database.
When I run backup perform -t my_backup ,I can works.
But when I check the task crontab -l ,it as this:

0 22 * * * /bin/bash -l -c ''backup perform -t my_backup''

Run cat /etc/crontab to check my cron configuration file,it''s:

SHELL=/bin/sh
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin

 It''s different between */bin/bash* and /bin/sh ,how to do?

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On Thursday, 30 August 2012 09:33:41 UTC-4, zhangjingqiang
wrote:
>
> OS : Ubuntu 12.04
>
> Now I use Backup <https://github.com/meskyanichi/backup> and
Whenever<https://github.com/javan/whenever> gem
> to backup my database.
> When I run backup perform -t my_backup ,I can works.
> But when I check the task crontab -l ,it as this:
>
> 0 22 * * * /bin/bash -l -c ''backup perform -t my_backup''
>
> Run cat /etc/crontab to check my cron configuration file,it''s:
>
> SHELL=/bin/sh
> PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
>
>  It''s different between */bin/bash* and /bin/sh ,how to do?
>
Cron runs commands with a very limited environment - PATH, for instance, 
may be missing things that it would have in your normal login shell.
It''s
typically a good idea to put an explicit path to any executable needed - so 
/some/path/to/backup instead of just backup.

Digging around in the code for ''backup'' also shows that you
may want to
pass --root-path=/wherever/your/app/lives to the script as well, to ensure 
that it can find the config files, etc that it needs.

--Matt Jones
 

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