I modified my /etc/hostname file and /etc/hosts like that:hostname.comand 127.0.0.1       localhost.localdomain localhost::1             localhost ip6-localhost ip6-loopbackff02::1         ip6-allnodesff02::2         ip6-allrouters1.1.1.1 hostname.comafter that I run hostname hostname.comnow when I run hostname -f the result is:hostname.com.comWhere did I go wrong?
hostname -f .com.com
networking;hostname;hosts;domain