sudo sh -c 'echo "127.0.0.1 mymachine.foo.com" >> /etc/hosts' sudo hostname mymachine.foo.com sudo hostname mymachine.foo.com -- OUTPUT: Password: hostname mymachine.foo.com ping mymachine.foo.com -- OUTPUT: PING mymachine.foo.com (127.0.0.1): 56 data bytes 64 bytes from 127.0.0.1: icmp_seq=0 ttl=64 time=0.051 ms 64 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=0.104 ms

bin/zookeeper-server-start.sh config/zookeeper.properties bin/kafka-server-start.sh config/server.properties