# Set up AWS CloudHSM key\$1mgmt\$1util Set up Complete the following setup before you use AWS CloudHSM key\$1mgmt\$1util (KMU). **Topics** + [ ## Step 1. Start the AWS CloudHSM client ](#key_mgmt_util-start-cloudhsm-client) + [ ## Step 2. Start key\$1mgmt\$1util ](#key_mgmt_util-start) ## Step 1. Start the AWS CloudHSM client Before you use key\$1mgmt\$1util, you must start the AWS CloudHSM client. The client is a daemon that establishes end-to-end encrypted communication with the HSMs in your cluster. The key\$1mgmt\$1util tool uses the client connection to communicate with the HSMs in your cluster. Without it, key\$1mgmt\$1util doesn't work. **To start the AWS CloudHSM client** Use the following command to start the AWS CloudHSM client. ------ #### [ Amazon Linux ] ``` $ sudo start cloudhsm-client ``` ------ #### [ Amazon Linux 2 ] ``` $ sudo service cloudhsm-client start ``` ------ #### [ CentOS 7 ] ``` $ sudo service cloudhsm-client start ``` ------ #### [ CentOS 8 ] ``` $ sudo service cloudhsm-client start ``` ------ #### [ RHEL 7 ] ``` $ sudo service cloudhsm-client start ``` ------ #### [ RHEL 8 ] ``` $ sudo service cloudhsm-client start ``` ------ #### [ Ubuntu 16.04 LTS ] ``` $ sudo service cloudhsm-client start ``` ------ #### [ Ubuntu 18.04 LTS ] ``` $ sudo service cloudhsm-client start ``` ------ #### [ Windows ] + For Windows client 1.1.2\$1: ``` C:\Program Files\Amazon\CloudHSM>net.exe start AWSCloudHSMClient ``` + For Windows clients 1.1.1 and older: ``` C:\Program Files\Amazon\CloudHSM>start "cloudhsm_client" cloudhsm_client.exe C:\ProgramData\Amazon\CloudHSM\data\cloudhsm_client.cfg ``` ------ ## Step 2. Start key\$1mgmt\$1util After you start the AWS CloudHSM client, use the following command to start key\$1mgmt\$1util. ------ #### [ Amazon Linux ] ``` $ /opt/cloudhsm/bin/key_mgmt_util ``` ------ #### [ Amazon Linux 2 ] ``` $ /opt/cloudhsm/bin/key_mgmt_util ``` ------ #### [ CentOS 7 ] ``` $ /opt/cloudhsm/bin/key_mgmt_util ``` ------ #### [ CentOS 8 ] ``` $ /opt/cloudhsm/bin/key_mgmt_util ``` ------ #### [ RHEL 7 ] ``` $ /opt/cloudhsm/bin/key_mgmt_util ``` ------ #### [ RHEL 8 ] ``` $ /opt/cloudhsm/bin/key_mgmt_util ``` ------ #### [ Ubuntu 16.04 LTS ] ``` $ /opt/cloudhsm/bin/key_mgmt_util ``` ------ #### [ Ubuntu 18.04 LTS ] ``` $ /opt/cloudhsm/bin/key_mgmt_util ``` ------ #### [ Windows ] ``` PS C:\> & "C:\Program Files\Amazon\CloudHSM\key_mgmt_util.exe" ``` ------ The prompt changes to `Command:` when key\$1mgmt\$1util is running. If the command fails, such as returning a `Daemon socket connection error` message, try [updating your configuration file](troubleshooting-lost-connection.md).