在过去的几个月里，我无法通过 Ubuntu 16.04 连接到 WiFi；只能通过以太网电缆连接。
这是我的无线信息由无线脚本生成如果有任何帮助的话。
我认为这一定是由于驱动程序的原因，因此我运行apt-get update并收到此错误：
Hit:1 http://archive.ubuntu.com/ubuntu xenial InRelease
Hit:2 http://ppa.launchpad.net/mjasnik/ppa/ubuntu xenial InRelease
Get:3 http://archive.ubuntu.com/ubuntu xenial-updates InRelease [109 kB]
Hit:4 http://ppa.launchpad.net/nathan-renniewaldock/flux/ubuntu xenial InRelease
Hit:5 http://ppa.launchpad.net/plushuang-tw/uget-stable/ubuntu xenial InRelease
Get:6 http://archive.ubuntu.com/ubuntu xenial-backports InRelease [107 kB]
Hit:7 http://archive.canonical.com/ubuntu xenial InRelease
Hit:8 http://ppa.launchpad.net/qbittorrent-team/qbittorrent-stable/ubuntu xenial InRelease
Get:9 http://archive.ubuntu.com/ubuntu xenial-security InRelease [107 kB]
Hit:10 http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu xenial InRelease
Hit:11 http://ppa.launchpad.net/umang/indicator-stickynotes/ubuntu xenial InRelease
Hit:12 http://ppa.launchpad.net/webupd8team/atom/ubuntu xenial InRelease
Get:13 https://ftp.ussg.iu.edu/CRAN/bin/linux/ubuntu xenial/ InRelease [3.590 B]
Ign:13 https://ftp.ussg.iu.edu/CRAN/bin/linux/ubuntu xenial/ InRelease
Fetched 326 kB in 3s (98,8 kB/s)
Reading package lists... Done
W: GPG error: https://ftp.ussg.iu.edu/CRAN/bin/linux/ubuntu xenial/ InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 51716619E084DAB9
W: The repository 'https://ftp.ussg.iu.edu/CRAN/bin/linux/ubuntu xenial/ InRelease' is not signed.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
答案1
正如您在此处描述的：https://spout.ussg.indiana.edu/CRAN/bin/linux/ubuntu/对于 R 的存储库，您应该安装密钥（安全 ATP 部分）：
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys E084DAB9
然后做
apt update && apt upgrade
如果密钥安装正确，一切都会正常运行。