Hi,
When installing using the command:
@update.afni.binaries -package linux_ubuntu_16_64 -apsearch yes -bindir /opt/quarantine/afni
I find that the the *.so files dropped into /opt/quarantine/afni (why no lib dir?) are set executable (+x), which means when typing a command and attempting to use autocomplete in bash, those files will be suggested as a program which is runnable.