Ubuntu 12.04.3 amd64 desktop
Some 32-bit pre-built binary might not work in 64-bit environment, e.g.:
# XXXX -vSome would report "bash: XXXX: Not found".
bash: XXXX: No such file or directory
With 64-bit Ubuntu, install the following package fixed my problem:
apt-get install libc6:i386
64 bit - What happened to the ia32-libs package? - Ask Ubuntu