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CrowdStrike Falcon is a powerful endpoint protection platform that safeguards your devices against various cybersecurity threats, including malware, ransomware, and advanced persistent threats. If you want to install CrowdStrike Falcon on a Linux system, the process is straightforward but requires a few specific steps.

Here’s a comprehensive guide on how to download and install CrowdStrike on a Linux machine.

Step 1: Prerequisites for Installing CrowdStrike on Linux

Before downloading and installing CrowdStrike Falcon on your Linux machine, ensure that your system meets the following prerequisites:

  1. Linux Distribution Compatibility: CrowdStrike Falcon supports many popular Linux distributions, including:

    • Ubuntu (16.04 or later)
    • Debian (8 or later)
    • CentOS (7 or later)
    • Red Hat Enterprise Linux (RHEL 7 or later)
    • SUSE Linux Enterprise Server (SLES)
    • Oracle Linux 7 or later

    Ensure that your system is running one of these supported distributions.

  2. Kernel Version: CrowdStrike Falcon supports Linux kernel versions 3.10 or later. You can check your kernel version by running the command uname -r in the terminal.

  3. Administrator Privileges: You need administrative (root) access to install CrowdStrike Falcon on your system. Make sure you have the necessary permissions.

  4. Internet Connection: An active internet connection is required to download the CrowdStrike Falcon agent and enable it to communicate with the CrowdStrike cloud.

Step 2: Obtain the CrowdStrike Falcon Installer

CrowdStrike Falcon is not publicly available for direct download unless you have a valid CrowdStrike account or are part of an organization using the platform. The installer is typically provided by your IT or security team.

2.1 Contact Your IT Department

To get the installer, you’ll typically need to reach out to your organization’s IT department or CrowdStrike administrator. They will provide:

  • The download link to the appropriate Falcon installer package.
  • Any necessary credentials or installation tokens (e.g., customer ID, activation keys) required to activate the software.

2.2 Download from the CrowdStrike Console (For Admins)

If you are an IT administrator or have access to the CrowdStrike console, follow these steps to download the installer:

  1. Log in to your CrowdStrike Falcon Console.
  2. Navigate to the Sensor Downloads section. This section may be found under the Configuration tab or a similar menu, depending on your console version.
  3. Download the appropriate Linux package for your distribution (for example, .rpm for Red Hat/CentOS, .deb for Ubuntu/Debian).
  4. If you need help choosing the correct version, CrowdStrike usually provides clear guidance on which version to download based on your Linux distribution.

Step 3: Download the Falcon Sensor Installer

After obtaining the installer, follow these steps to download and install the CrowdStrike Falcon agent on your Linux system:

3.1 Download the Package

Once you have the installer link or file from your IT team or the CrowdStrike console, you can download it directly using a browser or through a command-line tool like wget or curl.

For example, to use wget:

  • Open the terminal and run the following command (replacing <installer_url> with the actual link):

If you are using curl, the command will look like this:

This will download the installer package (either .rpm or .deb depending on your Linux distribution) to your current working directory.

Step 4: Install the CrowdStrike Falcon Sensor

After downloading the appropriate installation package, you will need to install the CrowdStrike Falcon Sensor on your Linux machine.

4.1 For Debian/Ubuntu (using .deb)

If you are using a Debian-based system like Ubuntu, the installer will be in .deb format. You can install it using the dpkg tool:

  1. Open the terminal.
  2. Navigate to the directory where you downloaded the .deb package.
  3. Run the following command to install the packag
  4. After the installation, ensure that all dependencies are installed by running:

4.2 For Red Hat/CentOS (using .rpm)

If you are using a Red Hat-based system like CentOS or RHEL, the installer will be in .rpm format. To install it:

  1. Open the terminal.
  2. Navigate to the directory where you downloaded the .rpm package.
  3. Run the following command to install the package:

Step 5: Verify the Installation

Once the installation is complete, you’ll want to verify that the Falcon Sensor is installed and running correctly.

5.1 Check the Service Status

You can verify that the Falcon Sensor is running by checking the service status on your system.

  • Debian/Ubuntu: Run the following command to check the status of the Falcon service:

  • Red Hat/CentOS: Use the following command:

If the service is running, you should see an output indicating that the service is active.

5.2 Check the Falcon Sensor Logs

CrowdStrike also provides logs that can be checked to confirm proper functionality. To view the logs:

  • On Debian/Ubuntu, the logs are typically located in:

  • On Red Hat/CentOS, the logs are generally stored in:

You can use cat, tail, or less to view the logs. For example:

This will show you any relevant logs that indicate whether the sensor is functioning properly.

Step 6: Register the Falcon Sensor

After installing the Falcon Sensor, you need to register it with the CrowdStrike cloud platform. Your organization will typically provide you with an activation key or customer ID to register your system.

6.1 Using the Registration Command

Once the Falcon Sensor is installed, run the following command to register it with your CrowdStrike account:

Replace <Customer_ID> with the registration code provided by your IT team.

6.2 Verify the Registration

After registration, verify that the sensor is active and reporting by running:

This should confirm that your machine is properly connected to the CrowdStrike cloud.

Step 7: Update and Maintain CrowdStrike Falcon

After installing CrowdStrike Falcon on your Linux machine, it’s important to keep it up-to-date to ensure maximum protection. The Falcon sensor will automatically update in the background, but you can manually check for updates by running:

  • Debian/Ubuntu:

  • Red Hat/CentOS:

This will ensure that you have the latest protection updates and threat intelligence.

Step 8: Troubleshooting

If you encounter any issues during the installation or registration process, here are some common troubleshooting tips:

  1. Service Not Starting: If the Falcon service is not starting, ensure that your system meets the minimum kernel version and that no other security tools are conflicting with the Falcon sensor.
  2. Installation Fails: If the package installation fails, double-check that you are using the correct package for your Linux distribution (e.g., .deb for Debian/Ubuntu and .rpm for CentOS/Red Hat).
  3. Unable to Register: Ensure that the Customer ID or activation key is correct. If the issue persists, contact your IT support team for assistance.

Conclusion

Downloading and installing CrowdStrike Falcon on a Linux system is a simple process, as long as you follow the steps carefully. By downloading the appropriate installer, running the installation commands, and registering the sensor with your organization's CrowdStrike account, you can ensure that your Linux system is protected against cybersecurity threats. Always keep the Falcon sensor updated to ensure optimal protection. If you run into issues, reach out to your IT team for additional support.