Aliyun Linux release 2.1903 cnetos？

The message "Aliyun Linux release 2.1903" refers to a specific version of the Alibaba Cloud Linux operating system, which is a customized Linux distribution developed by Alibaba Cloud for use on their Elastic Compute Service (ECS) instances.

Let’s break this down:

✅ What is Aliyun Linux release 2.1903?

• Aliyun Linux is a Red Hat-based Linux distribution, optimized for performance and stability on Alibaba Cloud ECS instances.
• It’s designed specifically for cloud environments and provides enhanced performance, security, and integration with Alibaba Cloud services.
• Release 2.1903 means:
  • 2: This is version 2 of Aliyun Linux (based on CentOS/RHEL 7.x).
  • 1903: Stands for March 2019, indicating the release date (year 2019, month 03).

This version is binary-compatible with CentOS Linux 7 and Red Hat Enterprise Linux 7.

🔄 Is it the same as CentOS?

• Aliyun Linux 2.1903 is similar but not identical to CentOS 7 or RHEL 7.
• It includes:
  • Optimizations for cloud workloads
  • Kernel patches and enhancements
  • Tools and configurations tuned for Alibaba Cloud infrastructure
• However, it maintains compatibility with most software that runs on CentOS 7 or RHEL 7.

🔍 How to check your OS version

You can confirm the OS version using the following commands in the terminal:

cat /etc/os-release

or

cat /etc/aliyun-release

You should see output like:

Aliyun Linux release 2.1903 (LTS)

⚠️ End of Life (EOL)

Aliyun Linux 2 versions are based on RHEL 7 and typically follow a similar lifecycle. As of now (2025), RHEL 7 reaches end of life in June 2024, so Aliyun Linux 2.x is also reaching or has reached EOL.

If you’re still using Aliyun Linux 2.1903, consider upgrading to a newer version such as:

• Aliyun Linux 3 (based on RHEL 8)
• Aliyun Linux 4 (based on RHEL 9)

These newer versions provide better support, security updates, and improved performance.

📦 Summary

If you’re managing an ECS instance running Aliyun Linux 2.1903, it’s recommended to plan for migration to a supported OS version to ensure continued security and compatibility.

Let me know if you want help upgrading or checking for compatibility!