After installing and configuring LISTSERV on unix, './go' and './go bg' results in only a return to the shell prompt.  No errors are written to the console and (when started in background mode) no log is written.

Typically this means that the 'listserv' user has not been assigned a working login shell.  For instance, when creating the 'listserv' user, you may have assigned '/usr/bin/false'  or '/sbin/nologin' as its default shell.  LISTSERV must have a working login shell in order to work (we generally recommend 'sh' or 'bash').