Installing a Linux Agent

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Supported Distributions

Currently, the Linux Agent only officially supports Ubuntu, Red Hat, Debian, Fedora, and CentOS. Although most of the data collection is generic to any Linux distribution, thus far testing has only been completed on Ubuntu, Red Hat, Debian, Fedora, and CentOS.

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Raspberry Pi/ARM-based Linux OS Support

ARM-based Linux operating systems are not currently supported for our Linux Agent. If this functionality appears useful to your organization, please upvote the implementation of this feature request here.

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Linux Agent 1.9.4 and lower

If you are running Linux Agent 1.9.4 or lower you must uninstall your agent version before proceeding to install the latest version. Instructions for completing this can be found here

In this article

1. Recording a Liongard Access Key ID and Secret
2. Installing the Agent
3. Downloading the Agent Installer Manually
4. Per-Environment Agent Installer
5. Uninstalling the Linux Agent
6. Troubleshooting
7. FAQs

Recording a Liongard Access Key ID and Secret

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Access Tokens

Liongard Access Key Tokens and Secrets can be reused when installing Agents, or you can generate a new Access Key Token and Secret every time.

If you do decide to reuse the Access Key and Secret, it should be secured as you would any other sensitive password.

Our Access Tokens are used only to register an Agent. It is not something that the Agent stores, so if a token gets deleted, nothing will happen to Agents that were installed using that token.

1. In Liongard, navigate to Your Name > Account Settings > Access Tokens

• If you have an existing Access Token, you may use it to deploy the Agent.
• If you need to generate a new token, select Generate New Token then select Agent Install Token.
• Note: Users must be a member of the Global Admin, Global Environment Manager, or Global System Integrators groups to see the Agent Install Token option.

2. Record a Liongard Access Key ID and Secret as you will need them in the next steps.

Installing the Agent

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What user should I run the Agent as?

We recommend using a normal local user with sudo access on the system. We do not recommend running as root.

1. Log into the Linux system
2. Download the Liongard Agent using wget or your preferred method:

• wget:wget -k https://agents.static.liongard.com/LiongardAgent-lts-x64.xz.run
• curl: curl -o LiongardAgent-lts-x64.xz.run https://agents.static.liongard.com/LiongardAgent-lts-x64.xz.run

3. Verify that the file was downloaded with the ls command

3. Run chmod 700 LiongardAgent-lts-x64.xz.run to give the file executable permissions.

4. Run the the command to install the agent:
   sudo ./LiongardAgent-lts-x64.xz.run -- -u InstanceURL -k AccessKey -s AccessSecret

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Initiating arguments

The use of -- must precede any arguments used for the installer

The available arguments for the agent installer are as follows:

• -u: Liongard Instance URL (Required)
• -k: Agent Access Key (Required)
• -s: Agent Access Secret (Required)
• -n: Agent Name
• -e: Liongard Environment
• -d: Agent Description

Downloading the Agent Installer Manually

• Log in to Liongard
• Click on the Admin menu and select Agents

• Hover over the Download Agent Installer button in the top-right corner and select Linux

• You can either download the install script by clicking on the Download Linux Installer button or copy the curl command to download it in the Shell.

Optional: Use a Per-Environment Agent

You also have the option to download a Windows, Mac, or Linux agent installer that has been pre-configured for a specific environment. This pre-configured installer can then be used to install the agent without the need for any manual configuration.

To download a per-environment agent installer, navigate to the Admin > Agents page, click Download Agent Installer, and select your operating system. In the agent installer modal, click on Per-Environment Installer. In the Environment field, search for the name of the environment for which you are configuring the installer. After a few seconds, you can download your per-environment agent installer by clicking the Download button.

Uninstalling the Linux Agent

The agent can be uninstalled from the system with the installer file by using the -x argument as shown below:

• sudo ./LiongardAgent-lts-x64.xz.run -- -x

Troubleshooting

Checking the Agent Service

The following command can be used to check on the status of the Liongard Agent Service:

• systemctl status liongard-agent

Checking the Updating Service

The following command can be used to check on the status of the Liongard Updater Service:

• systemctl status liongard-agent-updater

Checking the Liongard Agent Timers

The following command can be used to check when the Liongard updater service checks for updates:

• systemctl list-timers | grep liongard

Checking Liongard Agent Logs

To assist support with troubleshooting Agent issues the following log files may be required to send to support for further analysis:

• /opt/liongard/logs/debug.log
• /opt/liongard/logs/error.log
• /opt/liongard/logs/heartbeat.log
• /opt/liongard/logs/updater.log

FAQs

* Do I need to allowlist specific URLs?

Yes. You must allowlist npmjs.org and nodejs.org as well as your Liongard instance in order to download and install the Agent successfully.

For further information about allowing URLs with the Agent, please visit the Deployment via MSI Installer document under the Allowlisting Requirements
section.

* Do you support all Linux distributions and versions?

Uninstall Linux Versions 1.9.4 or lower

Step 1. Download the uninstall script with the following command

• curl -k https://roar2.app.liongard.com/api/v1/agents/scripts/uninstall-roar-agent/ -o uninstall-roar-agent

Step 2. Open terminal in uninstall script location and run the following command

• chmod +x uninstall-roar-agent

Step 3. Finally, run the following command

• sh -e uninstall-roar-agent

Step 4. Log into your Liongard Instance

Step 5. Navigate to your Agents by going to Admin > Agents

Step 5. Delete the Uninstalled Agent(s)