I am installing 6.6 on Ubuntu 16.04 in a Virtual Box.
antat@ubuntu:~/Documents$ sudo chmod a+x  qnx-sdp-6.6-201402230339.bin
[sudo] password for antat: 
antat@ubuntu:~/Documents$ sudo PS1='$' ./qnx-sdp-6.6-201402230339.bin
Preparing to install...
Extracting the JRE from the installer archive...
Unpacking the JRE...
Extracting the installation resources from the installer archive...
Configuring the installer for this system's environment...

Launching installer...

./qnx-sdp-6.6-201402230339.bin: 3320: exec: /tmp/install.dir.6724/Linux/resource/jre/bin/java: not found

BUT  /tmp/install.dir.6724/Linux/resource/jre/bin/java EXISTS.