參考博文：
1.報錯信息
Get:1 http://security.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB]
Get:2 http://archive.ubuntu.com/ubuntu bionic InRelease [242 kB]
Err:1 http://security.ubuntu.com/ubuntu bionic-security InRelease
Couldn't create temporary file /tmp/apt.conf.oNI2ed for passing config to apt-key
Ign:3 https://developer.download.nvidia.cn/compute/cuda/repos/ubuntu1804/x86_64 InRelease
Err:2 http://archive.ubuntu.com/ubuntu bionic InRelease
Couldn't create temporary file /tmp/apt.conf.LB2Z9I for passing config to apt-key
Ign:4 https://developer.download.nvidia.cn/compute/machine-learning/repos/ubuntu1804/x86_64 InRelease
Get:6 http://archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB]
Err:6 http://archive.ubuntu.com/ubuntu bionic-updates InRelease
Couldn't create temporary file /tmp/apt.conf.d2Y2f9 for passing config to apt-key
Get:8 http://archive.ubuntu.com/ubuntu bionic-backports InRelease [74.6 kB]
Err:8 http://archive.ubuntu.com/ubuntu bionic-backports InRelease
Couldn't create temporary file /tmp/apt.conf.cpf13r for passing config to apt-key
Get:5 https://developer.download.nvidia.cn/compute/cuda/repos/ubuntu1804/x86_64 Release [564 B]
Get:7 https://developer.download.nvidia.cn/compute/machine-learning/repos/ubuntu1804/x86_64 Release [564 B]
Get:9 https://developer.download.nvidia.cn/compute/cuda/repos/ubuntu1804/x86_64 Release.gpg [819 B]
Ign:9 https://developer.download.nvidia.cn/compute/cuda/repos/ubuntu1804/x86_64 Release.gpg
Get:10 https://developer.download.nvidia.cn/compute/machine-learning/repos/ubuntu1804/x86_64 Release.gpg [833 B]
Ign:10 https://developer.download.nvidia.cn/compute/machine-learning/repos/ubuntu1804/x86_64 Release.gpg
Reading package lists... Done
W: GPG error: http://security.ubuntu.com/ubuntu bionic-security InRelease: Couldn't create temporary file /tmp/apt.conf.oNI2ed for passing config to apt-key
E: The repository 'http://security.ubuntu.com/ubuntu bionic-security InRelease' is not signed.
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.
W: GPG error: http://archive.ubuntu.com/ubuntu bionic InRelease: Couldn't create temporary file /tmp/apt.conf.LB2Z9I for passing config to apt-key
E: The repository 'http://archive.ubuntu.com/ubuntu bionic InRelease' is not signed.
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.
W: GPG error: http://archive.ubuntu.com/ubuntu bionic-updates InRelease: Couldn't create temporary file /tmp/apt.conf.d2Y2f9 for passing config to apt-key
E: The repository 'http://archive.ubuntu.com/ubuntu bionic-updates InRelease' is not signed.
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.
W: GPG error: http://archive.ubuntu.com/ubuntu bionic-backports InRelease: Couldn't create temporary file /tmp/apt.conf.cpf13r for passing config to apt-key
E: The repository 'http://archive.ubuntu.com/ubuntu bionic-backports InRelease' is not signed.
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.
W: GPG error: https://developer.download.nvidia.cn/compute/cuda/repos/ubuntu1804/x86_64 Release: Couldn't create temporary file /tmp/apt.conf.S7sO56 for passing config to apt-key
E: The repository 'https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64 Release' is not signed.
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.
W: GPG error: https://developer.download.nvidia.cn/compute/machine-learning/repos/ubuntu1804/x86_64 Release: Couldn't create temporary file /tmp/apt.conf.rzSKDs for passing config to apt-key
E: The repository 'https://developer.download.nvidia.com/compute/machine-learning/repos/ubuntu1804/x86_64 Release' is not signed.
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.
解決方法：
https://blog.csdn.net/gpf19930310/article/details/82461306
換源： 在無vim等命令的情況下，可以使用echo命令
https://blog.csdn.net/miss1181248983/article/details/88578287