...

ssh-keygen -t dsa
# Do not type in any passkey. Just press enter.
cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys

Setup FQDN to point to loopback

You may also want to modify your /etc/hosts file so that your fully qualified domain name points to the loopback device.   Modify /etc/hosts so that it includes these lines (with your host name substituted as appropriate).

127.0.0.1       localhost
127.0.0.1       <Your-host-name> <Your-host-name>.ca.cloudera.com

Setup NTP for Kudu

On Ubuntu

sudo apt-get install ntp ntpdate
sudo service ntp start

On CentOS 7

yum install ntp
systemctl start ntpd

Make sure your clock is set correctly. If it's way off, NTP will only adjust it little by little. man ntpdate to maybe fix that.