Alibaba Cloud Linux 3.21.？

Regarding Alibaba Cloud Linux 3.21, you may be referring to the version information of Alibaba Cloud Linux 3 (also known as Alibaba Cloud Linux 3). Alibaba Cloud Linux is a self-developed Linux operating system by Alibaba Cloud, optimized for cloud computing and Alibaba Cloud hardware infrastructure.

Key Points:

1. Alibaba Cloud Linux 3:

   • Based on CentOS Stream or Red Hat Enterprise Linux (RHEL) upstream code.
   • Designed specifically for Alibaba Cloud environments with optimizations for performance, stability, and security.
   • Supports various Alibaba Cloud instance types and integrates well with cloud services like ECS, ESS, etc.

2. Version Number Format:

   • The version number 3.21 likely refers to version 3, release 21, following formats similar to other Linux distributions.
   • For example, some Linux distributions use formats like XX.YY, where XX is the major version and YY is the minor version or release year/month (e.g., 21 for 2021).

3. Features of Alibaba Cloud Linux 3:

   • Optimized kernel for cloud scenarios.
   • Integrated support for cloud tools like cloud-init, Alibaba Cloud CLI, etc.
   • Security enhancements and regular updates.
   • Pre-installed cloud environment drivers and software (like virtio, NVMe, etc.).

4. How to Check the Version:
   You can check the current Alibaba Cloud Linux version using the command line:

   cat /etc/os-release

   Or:

   lsb_release -d

5. Obtaining Alibaba Cloud Linux 3:

   • Available directly in Alibaba Cloud’s Elastic Compute Service (ECS) image market.
   • Can be selected when creating an ECS instance via the Alibaba Cloud console or API.

6. Official Documentation:
   To get detailed documentation about Alibaba Cloud Linux 3.21 or later versions, please visit the official Alibaba Cloud website or technical documentation center:

   • Alibaba Cloud Linux Documentation

If you are looking for specific features, changelogs, or download links for Alibaba Cloud Linux 3.21, I recommend checking:

• The Alibaba Cloud official documentation
• The Alibaba Cloud community forums
• The ECS image management console

If you have more specific questions about Alibaba Cloud Linux 3.21 (such as how to upgrade, install packages, or configure it), feel free to ask!