Ubuntu 22.04 LTS Beta发布：引入大量改进

与 Ubuntu 21.10 相比，Ubuntu 22.04 Beta 拉来了许多软件包更新，包括一些 GNOME 42 组件，现在默认使用 GNOME 的 Wayland 会话和 NVIDIA 的驱动程序，包括 GNOME 三重缓冲补丁，用于内存外处理的 systemd-oomd 集成，让部分伙伴档案退休，调整其POWER支持基线，以及许多其他更新。

在内核方面，由于 Long Term Support (LTS) 支持状态，该版本使用 Linux 5.15。这有点不幸，因为Linux 5.17已经很稳定了，而且在5.16~5.17之间有大量的改进，其中大部分没有回传到Jammy的5.15内核构建。

如果从 Ubuntu 21.10 或者 Ubuntu 20.04 LTS 升级到 Ubuntu 22.04 LTS Beta，可以参考以下步骤：

https://help.ubuntu.com/community/JammyUpgrades

Ubuntu 22.04 LTS Beta 镜像下载地址:

http://releases.ubuntu.com/22.04/ (Ubuntu and Ubuntu Server on x86)

其他镜像可以从以下链接进行下载

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)

完整更新日志：

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 的常规镜像以及所有风味版本都可以在以下链接中找到：

http://cdimage.ubuntu.com