¿Qué entrada de /etc/hosts asigna myhost.example.com a 192.168.1.100?
/etc/hosts
myhost.example.com
192.168.1.100
myhost.example.com 192.168.1.100
nameserver myhost.example.com
127.0.0.1 myhost.example.com
192.168.1.100 myhost.example.com