Stop Ambari Server. On the Server host:
ambari-server stop
Stop Ambari Agents. On each host:
ambari-agent stop
Upgrade the Ambari repository on all hosts and replace the old repo file with the new file:
![[Important]](../common/images/admon/important.png)
Important Check your current directory before you download the new repo file to make sure that there are no previous versions of the file. If you do not, and a previous version exists, the new download will be saved with a numeric extension such as
ambari.repo.1. Make sure that the version you copy is the new version.For RHEL/CentOS 5
wget http://public-repo-1.hortonworks.com/ambari/centos5/1.x/updates/1.2.3.7/ambari.repo cp ambari.repo /etc/yum.repos.d/ambari.repo
For RHEL/CentOS 6
wget http://public-repo-1.hortonworks.com/ambari/centos6/1.x/updates/1.2.3.7/ambari.repo cp ambari.repo /etc/yum.repos.d/ambari.repo
For SLES 11
wget http://public-repo-1.hortonworks.com/ambari/suse11/1.x/updates/1.2.3.7/ambari.repo cp ambari.repo /etc/zypp/repos.d/ambari.repo
![[Note]](../common/images/admon/note.png)
Note If your cluster does not have access to the Internet, you need to set up a local repository with this data before you continue. See Configure the Local Repositories for more information.
