ubuntu 16.04 sudo apt-get update 報錯：下列簽名無效： KEYEXPIRED 1538166745 KEYEXPIRED 1538166745 ...

ubuntu 16.04更新報錯：

sudo apt-get update
命中:1 http://mirrors.aliyun.com/ubuntu xenial InRelease
命中:2 http://mirrors.aliyun.com/ubuntu xenial-security InRelease 
命中:3 http://mirrors.aliyun.com/ubuntu xenial-updates InRelease 
命中:4 http://mirrors.aliyun.com/ubuntu xenial-proposed InRelease 
命中:5 http://mirrors.aliyun.com/ubuntu xenial-backports InRelease 
命中:6 http://mirrors.aliyun.com/docker-engine/apt/repo ubuntu-xenial InRelease 




獲取:7 https://packages.microsoft.com/repos/vscode stable InRelease [2,802 B] 
命中:8 https://download.docker.com/linux/ubuntu xenial InRelease 
獲取:9 http://security.ubuntu.com/ubuntu xenial-security InRelease [107 kB] 
獲取:10 https://nvidia.github.io/libnvidia-container/ubuntu16.04/amd64 InRelease [1,106 B] 
獲取:11 https://nvidia.github.io/nvidia-container-runtime/ubuntu16.04/amd64 InRelease [1,136 B] 
獲取:12 https://nvidia.github.io/nvidia-docker/ubuntu16.04/amd64 InRelease [1,129 B] 
命中:13 http://cn.archive.ubuntu.com/ubuntu xenial InRelease 
獲取:14 https://packages.microsoft.com/repos/vscode stable/main amd64 Packages [70.4 kB] 
獲取:15 http://cn.archive.ubuntu.com/ubuntu xenial-updates InRelease [109 kB] 
命中:16 https://deb.nodesource.com/node_6.x xenial InRelease 
錯誤:10 https://nvidia.github.io/libnvidia-container/ubuntu16.04/amd64 InRelease 
 下列簽名無效： KEYEXPIRED 1538166745 KEYEXPIRED 1538166745 KEYEXPIRED 1538166745 KEYEXPIRED 1538166745
錯誤:11 https://nvidia.github.io/nvidia-container-runtime/ubuntu16.04/amd64 InRelease 
 下列簽名無效： KEYEXPIRED 1538166745 KEYEXPIRED 1538166745 KEYEXPIRED 1538166745 KEYEXPIRED 1538166745
錯誤:12 https://nvidia.github.io/nvidia-docker/ubuntu16.04/amd64 InRelease 
 下列簽名無效： KEYEXPIRED 1538166745 KEYEXPIRED 1538166745 KEYEXPIRED 1538166745 KEYEXPIRED 1538166745
命中:17 http://ppa.launchpad.net/ethereum/ethereum-dev/ubuntu xenial InRelease 
命中:18 http://ppa.launchpad.net/ethereum/ethereum/ubuntu xenial InRelease 
獲取:19 http://cn.archive.ubuntu.com/ubuntu xenial-backports InRelease [107 kB]
獲取:20 http://security.ubuntu.com/ubuntu xenial-security/main amd64 DEP-11 Metadata [67.7 kB]
獲取:21 http://security.ubuntu.com/ubuntu xenial-security/main DEP-11 64x64 Icons [68.0 kB]
獲取:22 http://security.ubuntu.com/ubuntu xenial-security/universe amd64 DEP-11 Metadata [108 kB]
獲取:23 http://cn.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages [856 kB]
獲取:24 http://security.ubuntu.com/ubuntu xenial-security/universe DEP-11 64x64 Icons [150 kB]
忽略:25 https://dl.bintray.com/sbt/debian InRelease 
獲取:26 http://cn.archive.ubuntu.com/ubuntu xenial-updates/main i386 Packages [767 kB] 
獲取:27 http://cn.archive.ubuntu.com/ubuntu xenial-updates/main amd64 DEP-11 Metadata [320 kB] 
獲取:28 http://cn.archive.ubuntu.com/ubuntu xenial-updates/main DEP-11 64x64 Icons [227 kB] 
獲取:29 http://cn.archive.ubuntu.com/ubuntu xenial-updates/universe amd64 Packages [690 kB] 
獲取:30 http://cn.archive.ubuntu.com/ubuntu xenial-updates/universe i386 Packages [632 kB] 
獲取:31 http://cn.archive.ubuntu.com/ubuntu xenial-updates/universe amd64 DEP-11 Metadata [247 kB] 
獲取:32 http://cn.archive.ubuntu.com/ubuntu xenial-updates/universe DEP-11 64x64 Icons [333 kB] 
獲取:33 https://dl.bintray.com/sbt/debian Release [815 B] 
命中:33 https://dl.bintray.com/sbt/debian Release 
獲取:35 http://cn.archive.ubuntu.com/ubuntu xenial-updates/multiverse amd64 DEP-11 Metadata [5,960 B] 
獲取:36 http://cn.archive.ubuntu.com/ubuntu xenial-updates/multiverse DEP-11 64x64 Icons [14.3 kB] 
獲取:37 http://cn.archive.ubuntu.com/ubuntu xenial-backports/main amd64 DEP-11 Metadata [3,328 B] 
獲取:38 http://cn.archive.ubuntu.com/ubuntu xenial-backports/universe amd64 DEP-11 Metadata [5,104 B] 
錯誤:39 https://packagecloud.io/mrtazz/restclient-cpp/ubuntu xenial InRelease 
 Connection timed out after 120990 milliseconds
已下載 4,894 kB，耗時 2分 3秒 (39.8 kB/s)
正在讀取軟件包列表 完成
W: 校驗數字簽名時出錯。此倉庫未被更新，所以仍然使用此前的索引文件。GPG 錯誤：https://nvidia.github.io/libnvidia-container/ubuntu16.04/amd64 InRelease: 下列簽名無效：
 KEYEXPIRED 1538166745 KEYEXPIRED 1538166745 KEYEXPIRED 1538166745 KEYEXPIRED 1538166745W: 校驗數字簽名時出錯。此倉庫未被更新，所以仍然使用此前的索引文件。GPG 錯誤：https://nvidia.github.io/nvidia-container-runtime/ubuntu16.04/amd64 InRelease: 下列簽名
無效： KEYEXPIRED 1538166745 KEYEXPIRED 1538166745 KEYEXPIRED 1538166745 KEYEXPIRED 1538166745W: 校驗數字簽名時出錯。此倉庫未被更新，所以仍然使用此前的索引文件。GPG 錯誤：https://nvidia.github.io/nvidia-docker/ubuntu16.04/amd64 InRelease: 下列簽名無效： KEYEX
PIRED 1538166745 KEYEXPIRED 1538166745 KEYEXPIRED 1538166745 KEYEXPIRED 1538166745W: 無法下載 https://packagecloud.io/mrtazz/restclient-cpp/ubuntu/dists/xenial/InRelease Connection timed out after 120990 milliseconds
W: 無法下載 https://nvidia.github.io/libnvidia-container/ubuntu16.04/amd64/InRelease 下列簽名無效： KEYEXPIRED 1538166745 KEYEXPIRED 1538166745 KEYEXPIRED 15381667
45 KEYEXPIRED 1538166745W: 無法下載 https://nvidia.github.io/nvidia-container-runtime/ubuntu16.04/amd64/InRelease 下列簽名無效： KEYEXPIRED 1538166745 KEYEXPIRED 1538166745 KEYEXPIRED 153
8166745 KEYEXPIRED 1538166745W: 無法下載 https://nvidia.github.io/nvidia-docker/ubuntu16.04/amd64/InRelease 下列簽名無效： KEYEXPIRED 1538166745 KEYEXPIRED 1538166745 KEYEXPIRED 1538166745 KE
YEXPIRED 1538166745W: 部分索引文件下載失敗。如果忽略它們，那將轉而使用舊的索引文件。

表明密鑰過期，需要更新 參考 ubuntu 12.04下owncloud更新出現KEYEXPIRED解決方法 ，KEYEXPIRED for OwnCloud Ubuntu Package。 最終，在 nvidia 鏡像站找到更新 key的方法，參考 libnvidia-container： 的 Updating repository keys 的 Debian-based distributions

curl -s -L https://nvidia.github.io/libnvidia-container/gpgkey |
 sudo apt-key add -

試著更新一下：

 $ curl -s -L https://nvidia.github.io/libnvidia-container/gpgkey |




> sudo apt-key add -
OK

再更新軟件：

$ sudo apt-get update
命中:1 http://mirrors.aliyun.com/ubuntu xenial InRelease
命中:2 http://mirrors.aliyun.com/ubuntu xenial-security InRelease 
命中:3 http://mirrors.aliyun.com/ubuntu xenial-updates InRelease 
命中:4 http://mirrors.aliyun.com/ubuntu xenial-proposed InRelease 
命中:5 http://mirrors.aliyun.com/ubuntu xenial-backports InRelease 
命中:6 http://mirrors.aliyun.com/docker-engine/apt/repo ubuntu-xenial InRelease 
獲取:7 https://nvidia.github.io/libnvidia-container/ubuntu16.04/amd64 InRelease [1,106 B] 
獲取:8 https://nvidia.github.io/nvidia-container-runtime/ubuntu16.04/amd64 InRelease [1,136 B] 
命中:9 https://packages.microsoft.com/repos/vscode stable InRelease 
命中:10 http://cn.archive.ubuntu.com/ubuntu xenial InRelease 
獲取:11 https://nvidia.github.io/nvidia-docker/ubuntu16.04/amd64 InRelease [1,129 B]
命中:12 http://security.ubuntu.com/ubuntu xenial-security InRelease 
命中:13 https://download.docker.com/linux/ubuntu xenial InRelease 
命中:14 http://ppa.launchpad.net/ethereum/ethereum-dev/ubuntu xenial InRelease
命中:15 http://cn.archive.ubuntu.com/ubuntu xenial-updates InRelease 
命中:16 https://deb.nodesource.com/node_6.x xenial InRelease 
命中:17 http://cn.archive.ubuntu.com/ubuntu xenial-backports InRelease 
命中:18 http://ppa.launchpad.net/ethereum/ethereum/ubuntu xenial InRelease 
忽略:19 https://dl.bintray.com/sbt/debian InRelease
獲取:20 https://dl.bintray.com/sbt/debian Release [815 B] 
命中:20 https://dl.bintray.com/sbt/debian Release 
命中:22 https://packagecloud.io/mrtazz/restclient-cpp/ubuntu xenial InRelease 
已下載 3,371 B，耗時 33秒 (99 B/s)
正在讀取軟件包列表 完成

done!