Aliyun Linux release 2.1903 cnetos？

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

Let’s break it down:

✅ What is "Aliyun Linux release 2.1903"?

• Aliyun Linux is an enterprise-level Linux distribution provided by Alibaba Cloud.
• It is CentOS-compatible, meaning it behaves similarly to CentOS or RHEL (Red Hat Enterprise Linux) in terms of package management (yum), system services, and directory structure.
• The version 2.1903 means:
  • 2: Major version number
  • 1903: Year and month of release — March 2019

This version was based on CentOS 7.x and includes optimizations and patches specifically tailored for Alibaba Cloud environments.

❓Is it CentOS?

While Aliyun Linux 2.1903 is compatible with CentOS 7, it is not exactly CentOS. It is a customized OS built from source RPMs, similar to CentOS but optimized for Alibaba Cloud infrastructure.

You can verify this by checking the contents of /etc/os-release or using the command:

cat /etc/redhat-release

It might show something like:

Aliyun Linux release 2.1903 (Lance)

Or:

CentOS Linux release 7.6.1810 (Core)

depending on how it’s configured.

🔧 Package Management

Since it’s CentOS-like, you can use yum to install packages:

sudo yum update
sudo yum install <package-name>

And it uses .rpm packages just like CentOS/RHEL.

🔄 Aliyun Linux 2 vs. Aliyun Linux 3

If you’re using Aliyun Linux 2.1903, consider upgrading to Aliyun Linux 3 if long-term support and security updates are important.

💡 How to Check Your Current Version

Run:

cat /etc/alinux-release

or

cat /etc/os-release

🛠️ Summary

• Aliyun Linux 2.1903 is a CentOS 7-based Linux distro for Alibaba Cloud ECS.
• It’s compatible with CentOS but customized for performance and cloud integration.
• You can manage it using yum, just like CentOS 7.
• It’s an older version; newer versions like Aliyun Linux 3 are recommended for better support and features.

If you need help upgrading or checking what software is available on Aliyun Linux 2.1903, feel free to ask!