Getting your head around the crontab syntax can be a little work.
I can recommend the following resources:
- Crontab Guru
- and the marvellous examples at: Crontab Guru
One thing I have observed that I had not given much thought earlier is, that it is not easy to schedule something to run bi-weekly, you can do something along the lines of:
0 0 1,15 * * /path/to/script.sh
This runs:
- at:
00:00 - on day-of-month:
1and15
Alternatively you could do:
0 0 * * 1 [ $(( $(date +\%V) \% 2 )) -eq 0 ] && /path/to/script.sh
This is untried it should run:
- at:
00:00 - Works well, but relies on ISO week numbers (reset yearly)
- Pick odd (
-eq 1) or even (-eq 0) to choose your starting week
I really need to try this out, since I do not know if crontab can be programmatically configured like that, which would be really powerful.