# Install Repositories

Some repositories will be needed later to install Flight tools.

On all nodes do:
```
 yum install -y epel-release
```
-y is an option for the install command that answers yes to install confirmation messages.

Once this command has been run on every node, the cluster is ready for the next step.

# Testing

If all was successful, the added repositories will appear when running the command yum repolist on every node. E.g. on head node:

[root@chead1 ~]# yum repolist
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirror.freethought-internet.co.uk
 * epel: epel.mirror.liteserver.nl
 * extras: repo.uk.bigstepcloud.com
 * updates: mirror.mhd.uk.as44574.net
repo id                      repo name                                                  status
base/7/x86_64                CentOS-7 - Base                                            10,072
epel/x86_64                  Extra Packages for Enterprise Linux 7 - x86_64             13,750
extras/7/x86_64              CentOS-7 - Extras                                             516
updates/7/x86_64             CentOS-7 - Updates                                          4,160
repolist: 28,498