@katadelos: much appreciated
Just to make my intentions clear:
I would like to install the literary clock (
https://www.instructables.com/Litera...From-E-reader/) on the PW, which I purchased solely for this purpose. To get it working, the system's crontab needs to be updated manually, which I would like to do via SSH.
I am hesitating to try too much on my own in order not to brick the device (which is a PW B024..., by the way).
Any well-informed suggestions?
BTW: I have a very well-founded linux background, so I can follow any technical instructions easily...