Here is a road map to the X11R6.1 distribution area: tars core and contrib gzipped tar files, public patch 1 fixes public patches to core software xc untarred core software, with all public patches contrib untarred sources to the contrib software contrib-fixes patches to contrib software xdm-auth info about HasXdmAuth config option The tar files are stored in "gzip" format on our FTP server, and thus have a ".gz" suffix. If you cannot handle gzip compression, you can have our FTP server convert them to "compress" (.Z) or uncompressed format. Changing the suffix of the filename you ask for will change its format on the fly. Change ".gz" to ".Z" to get compress format. Remove the ".gz" suffix entirely to get the file uncompressed. You may examine the file xc/bug-report in your local source tree to see what public patches have been applied to your X11R6.1 source tree. After transferring the files, please read the Release Notes and Build Instructions for information on how to extract and build the software.