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Update Etc Hosts
----------------
**Summary:** update ``/etc/hosts``
This module will update the contents of ``/etc/hosts`` based on the
hostname/fqdn specified in config. Management of ``/etc/hosts`` is controlled
using ``manage_etc_hosts``. If this is set to false, cloud-init will not manage
``/etc/hosts`` at all. This is the default behavior.
If set to ``true`` or ``template``, cloud-init will generate ``/etc/hosts``
using the template located in ``/etc/cloud/templates/hosts.tmpl``. In the
``/etc/cloud/templates/hosts.tmpl`` template, the strings ``$hostname`` and
``$fqdn`` will be replaced with the hostname and fqdn respectively.
If ``manage_etc_hosts`` is set to ``localhost``, then cloud-init will not
rewrite ``/etc/hosts`` entirely, but rather will ensure that a entry for the
fqdn with a distribution dependent ip is present in ``/etc/hosts`` (i.e.
``ping <hostname>`` will ping ``127.0.0.1`` or ``127.0.1.1`` or other ip).
.. note::
if ``manage_etc_hosts`` is set ``true`` or ``template``, the contents
of ``/etc/hosts`` will be updated every boot. to make any changes to
``/etc/hosts`` persistant they must be made in
``/etc/cloud/templates/hosts.tmpl``
.. note::
for instructions on specifying hostname and fqdn, see documentation for
``cc_set_hostname``
**Internal name:** ``cc_update_etc_hosts``
**Module frequency:** per always
**Supported distros:** all
**Config keys**::
manage_etc_hosts: <true/"template"/false/"localhost">
fqdn: <fqdn>
hostname: <fqdn/hostname>
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