Unpacking tomcat6 (from .../tomcat6_6.0.35-1ubuntu3_all.deb) ...
Processing triggers for ureadahead ...
Setting up tomcat6 (6.0.35-1ubuntu3) ...
chmod: cannot access `/etc/tomcat6/tomcat-users.xml': No such file or directory
dpkg: error processing tomcat6 (--configure):
 subprocess installed post-installation script returned error exit status 1