Installation fails on Ubuntu 10.10 and 11.04

Hello,

thank you very much for you help!

/bin/bash was the bash itself, but /bin/sh was linked to dash. I could change this with

sudo dpkg-reconfigure dash

and choosing "No".

So your assumption was correct. But I guess my solution was only a workaround. Shell scripts depending on bash should explicitly call the bash (by setting the shebang) instead of the generous sh. Most Debian based distros use dash as non-interactive shell; some others even use csh or zsh for some purposes.

Anyway - the problem is solved (or worked around). Thank you!