diff --git a/deploy-guide/source/targethosts-prepare.rst b/deploy-guide/source/targethosts-prepare.rst
index 78b9b2c92b..55a3137f34 100644
--- a/deploy-guide/source/targethosts-prepare.rst
+++ b/deploy-guide/source/targethosts-prepare.rst
@@ -54,7 +54,7 @@ Configure Ubuntu
    .. code-block:: shell-session
 
        # apt-get install bridge-utils debootstrap ifenslave ifenslave-2.6 \
-         lsof lvm2 ntp ntpdate openssh-server sudo tcpdump vlan python
+         lsof lvm2 chrony openssh-server sudo tcpdump vlan python
 
 #. Install the kernel extra package if you have one for your kernel version \
 
@@ -70,12 +70,12 @@ Configure Ubuntu
       # echo 'bonding' >> /etc/modules
       # echo '8021q' >> /etc/modules
 
-#. Configure Network Time Protocol (NTP) in ``/etc/ntp.conf`` to
+#. Configure Network Time Protocol (NTP) in ``/etc/chrony/chrony.conf`` to
    synchronize with a suitable time source and restart the service:
 
    .. code-block:: shell-session
 
-      # service ntp restart
+      # service chrony restart
 
 #. Reboot the host to activate the changes and use the new kernel.
 
@@ -101,7 +101,7 @@ Configure CentOS
    .. code-block:: shell-session
 
        # yum install bridge-utils iputils lsof lvm2 \
-         ntp ntpdate openssh-server sudo tcpdump python
+         chrony openssh-server sudo tcpdump python
 
 #. Add the appropriate kernel modules to the ``/etc/modules-load.d`` file to
    enable VLAN and bond interfaces:
@@ -111,13 +111,13 @@ Configure CentOS
       # echo 'bonding' >> /etc/modules-load.d/openstack-ansible.conf
       # echo '8021q' >> /etc/modules-load.d/openstack-ansible.conf
 
-#. Configure Network Time Protocol (NTP) in ``/etc/ntp.conf`` to
+#. Configure Network Time Protocol (NTP) in ``/etc/chrony.conf`` to
    synchronize with a suitable time source and start the service:
 
    .. code-block:: shell-session
 
-      # systemctl enable ntpd.service
-      # systemctl start ntpd.service
+      # systemctl enable chronyd.service
+      # systemctl start chronyd.service
 
 
 #. Reboot the host to activate the changes and use the new kernel.
@@ -144,7 +144,7 @@ Configure openSUSE
    .. code-block:: shell-session
 
        # zypper install bridge-utils iputils lsof lvm2 \
-         ntp opensshr sudo tcpdump python
+         chrony opensshr sudo tcpdump python
 
 #. Add the appropriate kernel modules to the ``/etc/modules-load.d`` file to
    enable VLAN and bond interfaces:
@@ -154,13 +154,13 @@ Configure openSUSE
       # echo 'bonding' >> /etc/modules-load.d/openstack-ansible.conf
       # echo '8021q' >> /etc/modules-load.d/openstack-ansible.conf
 
-#. Configure Network Time Protocol (NTP) in ``/etc/ntp.conf`` to
+#. Configure Network Time Protocol (NTP) in ``/etc/chrony.conf`` to
    synchronize with a suitable time source and start the service:
 
    .. code-block:: shell-session
 
-      # systemctl enable ntpd.service
-      # systemctl start ntpd.service
+      # systemctl enable chronyd.service
+      # systemctl start chronyd.service
 
 
 #. Reboot the host to activate the changes and use the new kernel.