SkyeG06's questions

我最近尝试在新发布的 Ubuntu 19.04 中安装深度桌面环境（DDE）......但失败了。我使用了命令sudo add-apt-repository ppa:leaeasy/dde并得到了这些错误：

Err:13 http://ppa.launchpad.net/elementary-os/stable/ubuntu disco Release      
  404  Not Found [IP: 91.189.95.83 80]
Err:14 http://ppa.launchpad.net/leaeasy/dde/ubuntu disco Release
  404  Not Found [IP: 91.189.95.83 80]
Get:15 http://gb.archive.ubuntu.com/ubuntu disco-updates/main amd64 DEP-11 Metadata [72.2 kB]
Err:16 http://ppa.launchpad.net/noobslab/icons/ubuntu disco Release
  404  Not Found [IP: 91.189.95.83 80]
Err:17 http://ppa.launchpad.net/ravefinity-project/ppa/ubuntu disco Release    
  404  Not Found [IP: 91.189.95.83 80]
Get:18 http://gb.archive.ubuntu.com/ubuntu disco-updates/main DEP-11 48x48 Icons [4,448 B]
Get:19 http://gb.archive.ubuntu.com/ubuntu disco-updates/main DEP-11 64x64 Icons [5,852 B]
Get:20 http://gb.archive.ubuntu.com/ubuntu disco-updates/universe amd64 DEP-11 Metadata [8,744 B]
Get:21 http://gb.archive.ubuntu.com/ubuntu disco-updates/universe DEP-11 48x48 Icons [6,157 B]
Get:22 http://gb.archive.ubuntu.com/ubuntu disco-backports/universe amd64 DEP-11 Metadata [7,164 B]
Reading package lists... Done                
E: The repository 'http://ppa.launchpad.net/elementary-os/stable/ubuntu disco Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://ppa.launchpad.net/leaeasy/dde/ubuntu disco Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://ppa.launchpad.net/noobslab/icons/ubuntu disco Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://ppa.launchpad.net/ravefinity-project/ppa/ubuntu disco Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

我搜索了它们，但在互联网上找不到任何有关这些错误的信息，而且我对 linux 还比较陌生。任何帮助将不胜感激，谢谢。

我最近在全新安装的 Ubuntu 19.04 上安装了 Unity，除了触摸板外它工作正常。除了用两根手指滚动之外，多点触控不起作用。我已经尝试进入设置 - >鼠标和触摸板，但没有多点触控选项。我也尝试过使用终端xinput set-prop无济于事。我是 ubuntu 的新手，所以我现在完全迷路了。任何帮助将不胜感激，谢谢。

我看到有人问过同样的问题，但都是12.04时代的。我想要的是使窗口边框对它们具有透明度，就像没有应用程序处于全屏状态时的顶部栏一样。任何帮助都将不胜感激。谢谢你。