# 3.  Configuring the Key9 SSH client

After the installation is complete, you will need to modify certain options in the main Key9 configuration file.  By default, this file is located at `/opt/k9/etc/k9.yaml`.

There are three options that require editing. They are:

1. `machine_group` - This is the Key9 group that this machine will be a member of. Any users that want to access this machine will need to also be a member of this group.
2. `company_uuid` - This is the unique identifier for your company or organization. This can be found in the Key9 console. (see below).
3. `api_key` - This is the "secret" used to access public keys for users attempting to access this system.

Within the Key9 web interface, DESCRIBE WHERE YOU CAN FIND THE API/COMPABY UUID GOES HERE. <br>

Note: To test, you can execute the following command with a user who already has SSH keys in Key9. If the command returns public keys for the user, Key9 SSH ran successfully.

`su - key9 --shell=/bin/bash -c "/opt/k9/bin/k9-ssh --user={username}`