When running the Link Agent on a Windows machine we recommend following the steps below to ensure the most reliable Link Agent configuration.
The Link Agent runs on Java and requires at least Java 9 or newer to be installed on the machine. We recommend installing Java 11. First, download and install the Java 11 JDK for Windows. The
.exe installer is usually the easiest option.
It may be necessary to set the
JAVA_HOME environment variable if the installer did not do this. First, edit the system environment variables:
JAVA_HOME does not appear under
System variables, we'll need to add it, and the
Path variable will also need to be adjusted.
System variables vs user variables
When adding/editing variables, ensure that you are doing so under the
System variables section toward the bottom of the
Environment Variables window, not the
User variables for... section at the top.
New... button, enter
JAVA_HOME as the variable name, and click the
Browse Directory... button. Navigate to the location where Java was installed. This path is usually under
C:\Program Files\Java. Choose the directory starting with
jdk-, for example
OK button, and verify that the
JAVA_HOME variable is present under
Next, select the
Path variable, and click the
New button, and enter
%JAVA_HOME%\bin. Click the
OK on the
Environment Variables and
System Properties windows.
Open a command prompt
Enter the command
java -version, and verify that you see output similar to the following image:
Note that the specific version of java may differ depending on what the latest version was when you installed it.
In the same command prompt, navigate to the directory where you downloaded the Link Agent (
link-agent.zip), and extract the archive using the following command:
powershell.exe -NoP -NonI -Command "Expand-Archive link-agent.zip"
cd into the
link-agent\link-agent directory, and execute the Link Agent script to verify that the Link Agent can run. Without any command-line arguments the Link Agent should print some help documentation and exit.
cd link-agent\link-agent bin\link-agent
Next, try running the Link Agent with the minimum required arguments:
- Your API key (
- A unique agent name (
Once you have verified that the Link Agent is working, we recommend creating a Windows service for the Link Agent so that it will continue running in the background even if you lock the screen or log out.
In order to install the LinkAgent as a system service you will need to first install a helper program called NSSM. Download NSSM from here, and extract the 64-bit version of the executable to a location on your path. You can create a separate directory for this executable such as
C:\nssm and add that directory to your path, or you can copy the executable to a directory that is already on your path such as
The next step is to take your full Link Agent command, (including API key, agent name, and any other parameters), and save it to a separate
.bat script. The script should contain the absolute path to the Link Agent. Below is an example of what this script might look like if you have followed previous examples in this guide:
C:\mabl\link-agent\link-agent\bin\link-agent -a <your-api-key-here> -n <your-link-agent-name-here>
Specify the absolute path to the link-agent executable
Remember to specify the absolute path to the Link Agent in your wrapper script. This path should start with a drive letter, such as
Save this file to a well known location, such as
C:\mabl\link-agent-wrapper.bat. Next, open a command prompt as an administrator:
Create a service for the Link Agent using NSSM, substituting in the path where you have created your wrapper script, and then start the new service:
nssm install LinkAgent C:\mabl\link-agent-wrapper.bat nssm start LinkAgent
LinkAgent service can be configured to run on startup if you wish, or you can start it manually via the
nssm start command.