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The Significance of Ubuntu Version Numbers: Understanding LTS Releases and End of Life Dates

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Understanding the versioning system of Ubuntu, the popular open-source operating system, is crucial for users to stay updated with the latest features, improvements, and security patches. In this article, we will delve into the significance of Ubuntu version numbers, the concept of Long Term Support (LTS) releases, and the importance of end-of-life dates.

Quick Answer

The version numbers of Ubuntu provide important information about the release, including the year and month of release, as well as the point release or revision number. LTS releases are special versions of Ubuntu that are supported for a longer period of time, typically five years, compared to regular releases which are supported for a shorter period, usually nine months. End of life dates signify when a specific Ubuntu release will no longer receive updates and support.

Ubuntu Version Numbers Explained

Ubuntu version numbers are not arbitrary. They follow a specific pattern that provides essential information about the release. Consider, for example, the version number “20.04.4”. This number can be broken down into three parts:

  • The first two digits “20” represent the year of release (2020).
  • The next two digits “04” represent the month of release (April).
  • The last portion “.4” indicates the point release or revision number.

The point release number signifies updates and improvements made to the original release. For instance, in the case of Ubuntu 20.04.4 LTS (Focal Fossa), it is the fourth revision of the 20.04 LTS release. Point releases often include updated components to support new hardware while maintaining stability by keeping everything else the same.

Understanding LTS Releases

LTS stands for Long Term Support. An Ubuntu LTS release is a special version of Ubuntu that is supported with updates for a longer period than regular releases. LTS releases are made every two years and are supported for five years, compared to the nine months of support for standard releases.

For example, Ubuntu 20.04 LTS (Focal Fossa) was released in April 2020 and will be supported until April 2025. In contrast, Ubuntu 21.10 (Impish Indri), a standard release, was released in October 2021 and will only be supported until July 2022.

LTS releases are favored in environments where stability is more important than having the latest features, such as servers or corporate desktops.

End of Life Dates

The “End of Life” date refers to the point when a particular Ubuntu release will no longer receive updates and support. After this date, users will not receive security updates, bug fixes, or software patches, leaving the system potentially vulnerable to security threats.

For example, Ubuntu 20.04.4 LTS has an “End of Standard Support” in April 2025. Therefore, it is crucial to consider the support timeline when choosing an Ubuntu version. You can check the end of life date of your current Ubuntu version by running the following command in the terminal:


This command will display the support status of your Ubuntu version, including the end of life date.


Understanding Ubuntu version numbers, LTS releases, and end of life dates is essential for maintaining a secure and stable system. By keeping track of these details, users can plan updates and migrations to newer versions, ensuring that their systems remain supported and secure. Remember, an unsupported system is a vulnerable system. So, always keep your Ubuntu version up to date.

What is the difference between an LTS release and a standard release?

An LTS (Long Term Support) release of Ubuntu is supported for five years, while a standard release is only supported for nine months. LTS releases are preferred for stability, while standard releases offer the latest features.

How can I find the end of life date for my current Ubuntu version?

You can find the end of life date for your current Ubuntu version by running the command "ubuntu-support-status" in the terminal. This command will display the support status, including the end of life date.

Why is it important to keep my Ubuntu version up to date?

Keeping your Ubuntu version up to date is important because it ensures that you receive security updates, bug fixes, and software patches. An unsupported system can be vulnerable to security threats.

Can I upgrade from a standard release to an LTS release?

Yes, it is possible to upgrade from a standard release to an LTS release. However, it is recommended to perform a clean installation of the LTS release for a more stable and reliable system.

How often are LTS releases of Ubuntu made?

LTS releases of Ubuntu are made every two years.

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