If you want to use full version tools on QNAP you must install Optware IPKG,
App center , Developer Tools
After installation connect with SSH ( putty ) to QNAP and install what you need.
ipkg install coreutils
ipkg install findutils
ipkg install util-linux
ipkg list (you can browse packets)
if you encounter this error: " /dev/fd/62: No such file or directory"
quick fix: ln -s /proc/self/fd /dev/fd #udev util is missing