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•

aggi
I've got a script for backing up my Rasperry Pi (not mine, I nicked it from somewhere, it looks very complicated).

To run it I use
```
sudo sh /home/pi/bkup_rpimage/bkup_rpimage.sh start -c /media/Raspi/Backup/$(date +%Y-%m-%d)_rpi_backup.img
```
which works fine.

I want to run it on a schedule though so trying to run it as a cron job.

I did
```
sudo crontab -e
```
which so far as I understand is what you use for running jobs that need root and then my entry is
```
0 1 1,15 * * sh /home/pi/bkup_rpimage/bkup_rpimage.sh start -c /media/Raspi/Backup/$(date +%Y-%m-%d)_rpi_backup.img
```
which should run it twice a month.

I can see from syslog that it has started but no backup is created. I do get an error message
```
(CRON) info (No MTA installed, discarding output)
```
but so far as I can tell from google this shouldn't be stopping it running.

Any bright ideas? Cheers

•

Greenbank in reply to @aggi
I do get an error message
(CRON) info (No MTA installed, discarding output)

but so far as I can tell from google this shouldn't be stopping it running.
That's CRON saying that it can't find anything to use to mail you the stdout/stderr that the script is producing.

So you might be getting some errors but they'll never be reported anywhere.

Changing the script being run to do something like:-
```
sh /home/pi/bkup_rpimage/bkup_rpimage.sh start -c /media/Raspi/Backup/$(date +%Y-%m-%d)_rpi_backup.img > /tmp/backup.log.$(date +%s) 2>&1
```
would mean the output gets redirected to a /tmp/backup.log.<UTC date> file which you can look at yourself.

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