Hi,
I have now done coding of cronjob that moves irclogs older than 6 months to another directory, that is not accessible on website.
It's now installed on alexandria, and you can see most of it's source (without file paths) also at:
https://gist.github.com/xet7/0cb663e31d51234f448c594abeee098e
On alexandria it uses another shell that's there, and works the same.
Cronjob runs every first day of every month.
I have run it on alexandria once manually.

BR,
xet7