RethinkDB, when starting up normally with a serve or porcelain command, prints the RethinkDB version and uname -r info. Running rethinkdb --version just gets you the RethinkDB version, and it doesn't tell you what type of machine you're running on.

• rethinkdb --version should also print the uname -r info that tells what machine you're on.
• Also, the RethinkDB version should tell what the target architecture of the RethinkDB executable is, since that's not necessarily the same as the machine architecture. You can run 32-bit executables on 64-bit systems.