[Xymon] dynamic logfile name

Dear Paul,

thank you for the examples. According to this I tried the following lines, but they did not work:

log:ls /path/to/server_logs/$(date +%Y%m%d):102400 file:ls /path/to/server_logs/$(date +%Y%m%d)

Can you tell me please, how to escape the date-command?

Regards

Oliver