/usr/bin/couchjs is in couchdb-bin 1.6.0-0ubuntu7.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/bin/../lib/x86_64-linux-gnu/couchdb/bin/couchjs
/usr/bin/../lib/x86_64-linux-gnu/couchdb/bin/couchjs