Canonical 和 Ubuntu 社區今天宣布 Ubuntu 22.04 LTS “Jammy Jellyfish”的 Beta 版本，正式版計劃將於 4 月 21 日發布。此外，Ubuntu / Ubuntu Server / Ubuntu Cloud 以及Kubuntu、Lubuntu、Ubuntu Budgie、UbuntuKylin、Ubuntu MATE、Ubuntu Studio 和 Xubuntu 等風味版本也同步發布。
與 Ubuntu 21.10 相比，Ubuntu 22.04 Beta 拉來了許多軟件包更新，包括一些 GNOME 42 組件，現在默認使用 GNOME 的 Wayland 會話和 NVIDIA 的驅動程序，包括 GNOME 三重緩衝補丁，用於內存外處理的 systemd-oomd 集成，讓部分夥伴檔案退休，調整其POWER支持基線，以及許多其他更新。
在內核方面，由於 Long Term Support (LTS) 支持狀態，該版本使用 Linux 5.15。這有點不幸，因為Linux 5.17已經很穩定了，而且在5.16~5.17之間有大量的改進，其中大部分沒有回傳到Jammy的5.15內核構建。
如果從 Ubuntu 21.10 或者 Ubuntu 20.04 LTS 升級到 Ubuntu 22.04 LTS Beta，可以參考以下步驟：
https://help.ubuntu.com/community/JammyUpgrades
Ubuntu 22.04 LTS Beta 鏡像下載地址:
http://releases.ubuntu.com/22.04/ (Ubuntu and Ubuntu Server on x86)
其他鏡像可以從以下鏈接進行下載
http://cloud-images.ubuntu.com/daily/server/jammy/current/ (Cloud Images)
http://cdimage.ubuntu.com/releases/22.04/beta/ (Non-x86)
http://cdimage.ubuntu.com/netboot/22.04/ (Netboot)
完整更新日誌：
https://discourse.ubuntu.com/t/jammy-jellyfish-release-notes/24668
Kubuntu:
Kubuntu is the KDE based flavour of Ubuntu. It uses the Plasma desktop and includes a wide selection of tools from the KDE project.
The Beta images can be downloaded at:
http://cdimage.ubuntu.com/kubuntu/releases/22.04/beta/
Lubuntu:
Lubuntu is a flavor of Ubuntu which uses the Lightweight Qt Desktop Environment (LXQt). The project’s goal is to provide a lightweight yet functional Linux distribution based on a rock-solid Ubuntu base.
The Beta images can be downloaded at:
http://cdimage.ubuntu.com/lubuntu/releases/22.04/beta/
Ubuntu Budgie:
Ubuntu Budgie is a community developed desktop, integrating Budgie Desktop Environment with Ubuntu at its core.
The Beta images can be downloaded at:
http://cdimage.ubuntu.com/ubuntu-budgie/releases/22.04/beta/
UbuntuKylin:
UbuntuKylin is a flavor of Ubuntu that is more suitable for Chinese users.
The Beta images can be downloaded at:
http://cdimage.ubuntu.com/ubuntukylin/releases/22.04/beta/
Ubuntu MATE:
Ubuntu MATE is a flavor of Ubuntu featuring the MATE desktop environment.
The Beta images can be downloaded at:
http://cdimage.ubuntu.com/ubuntu-mate/releases/22.04/beta/
Ubuntu Studio:
Ubuntu Studio is a flavor of Ubuntu that provides a full range of multimedia content creation applications for each key workflow: audio,graphics, video, photography and publishing.
The Beta images can be downloaded at:
http://cdimage.ubuntu.com/ubuntustudio/releases/22.04/beta/
Xubuntu:
Xubuntu is a flavor of Ubuntu that comes with Xfce, which is a stable,light and configurable desktop environment.
The Beta images can be downloaded at:
http://cdimage.ubuntu.com/xubuntu/releases/22.04/beta/
Ubuntu 的常規鏡像以及所有風味版本都可以在以下鏈接中找到：
http://cdimage.ubuntu.com