Importance of Patching a RedHat Server

RedHat servers are critical components in many organizations' IT infrastructure. As a leading provider of enterprise Linux solutions, RedHat offers a robust and production-ready operating system built on the Linux kernel. Let's delve into why it's crucial to patch RedHat servers regularly.

1. Understanding RedHat Server

RedHat, founded in 1993, is one of the pioneering companies in the open-source software industry. It developed RedHat Enterprise Linux (RHEL), a distribution renowned for its stability, security, and support. RHEL is extensively used in production environments, powering servers in diverse industries such as finance, healthcare, and government.

2. Applying Updates on RedHat

To apply updates on a RedHat server, administrators typically use the yum command-line package manager. Here are some common commands:

    yum check-update     # Check for available updates
    yum update           # Apply available updates
    yum list installed   # List all installed packages
    yum update-to security   # Limit update to security patches

For servers running RHEL 8 or newer, dnf is used as it provides improved performance and better dependency management. Here are equivalent dnf commands:

    dnf check-update          # Check for available updates
    dnf update                # Apply available updates
    dnf list installed        # List installed packages
    dnf upgrade-minimal --security  # Apply only security updates

3. Importance of Keeping RedHat Servers Up to Date

Regular updates are crucial for maintaining the security and stability of RedHat servers. Failure to patch known vulnerabilities can expose systems to malicious attacks. Notable CVEs in software like sudo, bash, and ssh underscore the importance of timely patching. Services like provide curated updates, enhancing security posture.

To stay protected, administrators can sign up for updates at

4. Ensuring RedHat Server Security

Automated tools like dnf-automatic can assist in keeping RedHat servers up to date. However, they may not cover all scenarios and are best suited for personal servers. For comprehensive protection, leveraging services like is recommended.

Configuring dnf-automatic involves editing the /etc/dnf/automatic.conf file to set automatic update options, such as:

    upgrade_type = security
    random_sleep = 300

5. Understanding CVEs

A CVE (Common Vulnerabilities and Exposures) is a unique identifier assigned to a known security vulnerability. It's crucial for administrators to stay informed about the latest CVEs affecting their systems. By addressing CVEs promptly, organizations can mitigate potential risks and safeguard their infrastructure.