我正在尝试从Microsoft APT 存储库安装一些软件包（因为我非常讨厌 Snap！），但我似乎无法添加其密钥：
$ curl https://packages.microsoft.com/keys/microsoft.asc | sudo apt-key add -
OK
它说可以，但密钥不起作用：
$ sudo apt update
[...]
Err:7 https://packages.microsoft.com/repos/vscode stable InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY EB3E94ADBE1229CF
Reading package lists... Done
W: GPG error: https://packages.microsoft.com/repos/vscode stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY EB3E94ADBE1229CF
E: The repository 'https://packages.microsoft.com/repos/vscode stable InRelease' is not signed.
N: Updating from such a repository can't …在我的 Debian 服务器上，我习惯于按 Tab 来“预览”shell 模式的扩展：
$ cp *some*<Tab>
something somewhat have-some-cake
$ cp *some*_
当模式扩展为一个条目时，Tab 将模式替换为实际条目；否则它会显示匹配条目的列表。这是直观且有用的，因为它与常规的“前缀”制表符完成一致。
但是我的 Ubuntu 服务器和台式机的行为不同：即使它会扩展到多个条目，Tab也会用第一个条目替换该模式。
我已经检查了常见的可疑对象（/etc/bash.bashrc、/etc/inputrc 和本地版本），但我找不到任何区别。
有人知道哪个设置控制这种行为吗？
I'm trying to get hardware encoding working on ffmpeg.
I'm using Ubuntu 18.04 with its default kernel (4.15.0-50.54), ffmpeg package (3.4.6-0ubuntu0.18.04.1) and Nvidia drivers (390.116-0ubuntu0.18.04.1)
My hardware is a Lenovo Thinkpad P40 Yoga with a NVidia Quadro M500M (GM108GLM) which is supposed to have PureVideo HD 6 (VP6). I have not found a list of the codecs, pixel formats, bitrates, and resolutions supported by NVENC on this card, but it should be able to encode simple H264 videos at the …