Gcc-arm-none-eabi-5_4-2016q2/bin/arm-none-eabi-g++: Command not found

Installing PX4 software for NuttX development to Ubuntu 16.04 LTS. I’ve followed all the instructions, and downloaded the toolkit, but when I compile my code I get this error.

/home/USER/gcc-arm-none-eabi-5_4-2016q2/bin/arm-none-eabi-g++: Command not found

not sure how to address this. Any help is appreciated.

Edit: Problem solved. Installed the 32-bit support libraries. Thought that was only for Debian Linux.