http://bugzilla.suse.com/show_bug.cgi?id=929471 http://bugzilla.suse.com/show_bug.cgi?id=929471#c27 --- Comment #27 from Dr. Werner Fink <werner@suse.com> --- Rational for choosing a hostname without domain name can be found in RFC 1178 and RFC 1123 https://tools.ietf.org/html/rfc1178 [...] Avoid domain names. For technical reasons, domain names should be avoided. In particular, name resolution of non-absolute hostnames is problematic. Resolvers will check names against domains before checking them against hostnames. But we have seen instances of mailers that refuse to treat single token names as domains. For example, assume that you mail to "libes@rutgers" from yale.edu. Depending upon the implementation, the mail may go to rutgers.edu or rutgers.yale.edu (assuming both exist). [...] https://tools.ietf.org/html/rfc1123 2.1 Host Names and Numbers The syntax of a legal Internet host name was specified in RFC-952 [DNS:4]. One aspect of host name syntax is hereby changed: the restriction on the first character is relaxed to allow either a letter or a digit. Host software MUST support this more liberal syntax. Host software MUST handle host names of up to 63 characters and SHOULD handle host names of up to 255 characters. [...] Btw: the array for the hostname in /proc/sys/kernel/hostname has 64 characters which includes the trailing ASCII null as well as the hostname. -- You are receiving this mail because: You are on the CC list for the bug.