How To Check Amazon Linux Version

Amazon Linux is a popular choice for developers and system administrators who deploy cloud-based applications on Amazon Web Services (AWS). Keeping track of your Amazon Linux version is essential for ensuring compatibility, security updates, and proper system management. Whether you're troubleshooting, planning upgrades, or simply verifying your environment, knowing how to check your Amazon Linux version is a fundamental skill. In this guide, we'll walk you through various methods to identify your Amazon Linux version efficiently and accurately.

Understanding Amazon Linux and Its Variants

Amazon Linux is a Linux server operating system from Amazon Web Services designed specifically for AWS cloud environments. There are different versions and variants of Amazon Linux, primarily Amazon Linux 1 and Amazon Linux 2, each with distinct features and support policies. Amazon Linux 2 is the current long-term supported version, offering stability and security updates. It's crucial to know which version you're running, especially when applying updates or troubleshooting issues.

Method 1: Checking the /etc/os-release File

The most common way to identify the Amazon Linux version is by inspecting the /etc/os-release file. This file contains detailed information about the operating system, including the version number, ID, and other relevant data.

• Open your terminal or connect via SSH to your Amazon Linux instance.
• Run the following command:

cat /etc/os-release

This command outputs information similar to:

NAME="Amazon Linux"
VERSION="2"
ID="amzn"
ID_LIKE="amazon"
PRETTY_NAME="Amazon Linux 2"
ANSI_COLOR="0;33"
CPE_NAME="cpe:2.3:o:amazon:amazon_linux:2"
HOME_URL="https://aws.amazon.com/amazon-linux-2/"
BUG_REPORT_URL="https://github.com/amazonlinux/amazon-linux-extras/issues"

From this output, you can clearly see the VERSION and PRETTY_NAME indicating the Amazon Linux version you are running.

Method 2: Using the lsb_release Command

The lsb_release command provides Linux Standard Base and distribution-specific information. However, it might not be installed by default on Amazon Linux. If it's available, it offers a quick way to get OS details.

• First, check if lsb_release exists:

which lsb_release

If the command returns a path, proceed with:

lsb_release -a

Example output:

LSB Version:    :core-4.0-amzn
Distributor ID: Amazon
Description:    Amazon Linux release 2 (Karoo)
Release:        2
Codename:       Karoo

This method quickly reveals the Amazon Linux release version, making it an easy option if available.

Method 3: Using the uname Command

The uname command provides kernel-related information but can also give clues about your system's version.

• Run this command:

uname -a

Sample output:

Linux ip-172-31-45-67 4.14.243-169.274.amzn2.x86_64 #1 SMP Wed Jul 14 21:09:24 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

While uname -a doesn't directly specify the Amazon Linux version, the kernel version and build info can give hints. For precise version info, rely on other methods.

Method 4: Checking Amazon Linux Extras

Amazon Linux 2 supports the amazon-linux-extras command, which manages additional repositories and packages. It also provides versioning info.

• Run the command:

amazon-linux-extras info

Sample output includes details about available topics and the OS version.

While it doesn't explicitly show the OS version, it confirms the system is Amazon Linux 2 and lists available extras, which can be useful during system management.

Method 5: Using Package Manager Commands

Package managers like yum can also provide OS version information.

• Run the following command:

yum info centos-release

or

yum info amazon-linux-release

Note: Depending on your Amazon Linux version, the package names may vary.

Sample output for yum info amazon-linux-release:

Name        : amazon-linux-release
Version     : 2
Release     : 2022.0
Summary     : Amazon Linux release information

This confirms the OS version and release details.

Method 6: Checking the Kernel Version

The kernel version can sometimes provide hints about the Amazon Linux version, especially if you know the kernel release notes associated with each Amazon Linux release.

• Run:

uname -r

Example output:

4.14.243-169.274.amzn2.x86_64

This indicates Amazon Linux 2, as the kernel version and build string include "amzn2". However, for precise version details, use the other methods listed above.

Best Practices for Managing Amazon Linux Versions

Keeping your Amazon Linux system up to date and aware of its version is crucial for security and compatibility. Here are some best practices:

• Regularly check your current version using the methods outlined above.
• Subscribe to Amazon Linux security updates to stay protected against vulnerabilities.
• Plan upgrades carefully before switching between Amazon Linux 1 and Amazon Linux 2, as they have different support cycles.
• Use automation tools like Ansible or Chef to regularly verify and document system versions across your infrastructure.

Conclusion

Understanding how to check your Amazon Linux version is a fundamental task for anyone managing cloud-based Linux environments. Whether you're troubleshooting issues, planning updates, or ensuring security compliance, knowing your OS version helps streamline these processes. The methods discussed—checking the /etc/os-release file, using lsb_release, inspecting kernel info, and leveraging package managers—offer reliable ways to identify your Amazon Linux version quickly and accurately. Regularly verifying your system's version and staying informed about updates ensures your environment remains secure, stable, and compatible with your applications. Mastering these simple checks empowers you to manage your Amazon Linux instances more effectively and confidently.

Disclaimer: Articles are written by Humans, AI or Both. Verify Important information.