Your bug report #54625: Why do I need to specify `-o auto` for join's `-e` option to work? which was filed against the coreutils package, has been closed. The explanation is attached below, along with your original report. If you require more details, please reply to 54625@debbugs.gnu.org. -- 54625: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=54625 GNU Bug Tracking System Contact help-debbugs@gnu.org with problems