Make an SSH connection to the server running the API Gateway and select 8) Display Patch Management menu.

Welcome to the CA API Gateway - 9.3.00
running on Red Hat Enterprise Linux Server release 6.10 (Santiago)

This user account allows you to configure the appliance
What would you like to do?

 1) Configure system settings
 2) Display CA API Gateway configuration menu
 3) Use a privileged shell (root)
 4) Change the Master Passphrase
 5) Display Remote Management configuration menu
 6) Manage HSM
 7) Display CA API Gateway Enterprise Service Manager configuration menu
 8) Display Patch Management menu
 9) Display Log Viewing menu
 R) Reboot the CA API Gateway appliance (apply the new configuration)
 X) Exit (no reboot)

Please make a selection: 

Select 2) Install a patch ont othe Gateway.

This menu allows you to manage CA Technologies patches on the
CA API Gateway Appliance

What would you like to do?

 1) Upload a patch to the Gateway
 2) Install a patch onto the Gateway
 3) Delete patches from the Gateway
 4) List Gateway patch history
 X) Exit menu

Please make a selection: 

You will be presented with the patches that can be installed. These are the patches that you have uploaded.

This option installs a patch that has been uploaded.


The following patches are available for installation. 
Please make your selection via line number.

1) ID: CA_API_PlatformUpdate_64bit_v9.X-RHEL-2020-03-23 
   DESCRIPTION: Upgrades the CA API 64bit Platform to the 9.X-RHEL-2020-03-23 version. This patch requires that the 9.X Platform Update be installed first. It also requires a restart of the CA API Gateway Appliance.
2) ID: Layer7_API_PlatformUpdate_64bit_v9.X-RHEL-2020-04-27 
   DESCRIPTION: Upgrades the Layer7 API 64bit Platform to the 9.X-RHEL-2020-04-27 version. This patch requires that the 9.X Platform Update be installed first. It also requires a restart of the Layer7 API Gateway Appliance.
3) ID: Layer7_API_PlatformUpdate_64bit_v9.X-RHEL-2020-05-26 
   DESCRIPTION: Upgrades the Layer7 API 64bit Platform to the 9.X-RHEL-2020-05-26 version. This patch requires that the 9.X Platform Update be installed first. It also requires a restart of the Layer7 API Gateway Appliance.
4) ID: Layer7_API_PlatformUpdate_64bit_v9.X-RHEL-2020-06-24 
   DESCRIPTION: Upgrades the Layer7 API 64bit Platform to the 9.X-RHEL-2020-06-24 version. This patch requires that the 9.X Platform Update be installed first. It also requires a restart of the Layer7 API Gateway Appliance.
X) Exit menu

Please make a selection:

Select the patch you want to install and press enter.

You have chosen to install the following patch
" CA_API_PlatformUpdate_64bit_v9.X-RHEL-2020-03-23 "
Press [Enter] to continue

Please wait while the patch is installed ...

If the patch was successfully installed, something like this should be displayed.

Patch ID CA_API_PlatformUpdate_64bit_v9.X-RHEL-2020-03-23 (Upgrades the CA API 64bit Platform to the 9.X-RHEL-2020-03-23 version. This patch requires that the 9.X Platform Update be installed first. It also requires a restart of the CA API Gateway Appliance.) is INSTALLED, last modified on 2020-07-14T05:49:20-0500
Patch operation completed successfully.


Press [Enter] to continue

Reboot the API Gateway appliance for this change to take effect. After reboot, I always like to list the installed patches.