How to schedule for every two fridays with cron and/or at?

[Mike Fedyk]

M3 Freak wrote:

>On Fri, 2004-07-16 at 18:59, Mike Fedyk wrote:
>  
>
>>Hi,
>>
>>I have Amanda setup to run a daily backup Monday through Friday night.  
>>That works fine.
>>
>>But now I want to add a full backup every two weeks on Friday night and 
>>I'm having trouble creating cron entries that don't have the commands 
>>running on the same day for full and daily backups.
>>    
>>
>
>While I appreciate what you're trying to do, do you realize that
>AMANDA's entire reason for being is to make backups easier by not
>telling her what to do?  You are supposed to specify your tape and dump
>cycles, and then let AMANDA figure out the rest.  She'll schedule full
>dumps when she feels they're required, but the entire decision is based
>on how you set up the tape and dump cycles.
>  
>
Yes, I understand that, but sometimes you need to say "yes, there was is 
full backup on X tapes every other Friday" and not have to explain that 
you'll have to check to see which tape contains a full backup of this 
volume.

>AMANDA is a great backup program, but I see people trying to force
>backup schedules all the time.  It's not needed.
>
>You should subscribe to the AMANDA mailing list.  It has got to be one
>of the best, if not the best, mailing list out there.  People are
>insanely helpful.
>  
>
I just did that as a matter of fact.

Amanda looks pretty good now that I'm figuring out how it works, but the 
documentation is horrendous (especially the faq-o-matic).

Mike