(Tethering means that you connect your DSLR to your PC with e.g. a USB cable, and images you shoot get downloaded (and displayed, if desired) automatically.)
After doing some research I found out that
- Nikon’s Camera Control Pro supports tethered shooting. Unlike Canon’s EOS Utility is it not free, and the 30-day trial does not even install with wine. Fortunately ;)
- There is a Linux way for tethered shooting, as this blog post announces. gPhoto² delivers command-line support. So I downloaded the script collection from the blog post without examining the source code, switched to
/tmp, and executed it. It downloaded all images to/tmpand deleted them from the card. Not exactly what I wanted. As/tmpis cleared after each reboot, I copied the images to a safe location as fast as possible. - Rian posted a much more useful script witch makes use of the (relatively new)
--capture-tetheredgPhoto² option. Only new images will be transferred.
(gPhoto² also allows to control the DSLR, e.g. modifying shooting parameters or taking pictures each second etc.: link)