How to make a script running once a day (like a cron job)?
 

Hi,

I made a little rsync backup script which syncs the content of a folder on the n900 to a server. This works without a password using public key authentication via ssh.

My question now is: How can I make this little script running once a day? Or maybe once a hour? Is there a recommended solution for this?

Thanks, jukey

Re: How to make a script running once a day (like a cron job)?
 

Isn't cron available on the device?

Re: How to make a script running once a day (like a cron job)?
 

Take a look at this

Re: How to make a script running once a day (like a cron job)?
 

For your scenario, you might also want to take a look at Shepherd. But I think it's not quite ready yet.

Re: How to make a script running once a day (like a cron job)?
 

I'm not really a developer but I'll see if I can get som information out of it.

Thank you!

@jaark: There is a folder /etc/cron.daily but I can't run the command: cron as user or as root.

Re: How to make a script running once a day (like a cron job)?
 

Bit off-topic, but still.

You're using PKI auth without a password? Does the server check the validity of the certificate against a specific authority? If not, how will you be able to blacklist the certificate in case your device is stolen or lost?

Re: How to make a script running once a day (like a cron job)?
 

That's not really how SSH keys work. It doesn't use CAs and automatically trust anything signed by them, a server will trust a list of particular individual keys. If the device holding the private key is compromised you simply remove that particular key from the authorized keys list.

Re: How to make a script running once a day (like a cron job)?
 

I do realise that, but then you can really only use the key for one specific usage, as having to blacklist the key in several different servers is a security risk (simply put: you might forget one). On the other hand, if you use a different key for each usage, you are at risk of exposing a specific service, because that specific key wasn't blacklisted.

Hence my question, are there any server-side systems that allow to verify an SSH key against an authority (not specifically a CA, rather a key repo?)

Re: How to make a script running once a day (like a cron job)?
 

SSH supports Kerberos authentication, is this what you need?
http://docstore.mik.ua/orelly/networ...sh/ch11_04.htm