'sudo apt-get update'失败

Question

下面是 sudo apt-get update 的 o/p:

/etc/apt$ sudo apt-get update
Get:1 http://01.archive.ubuntu.com/ubuntu bionic InRelease [242 kB]
Err:1 http://01.archive.ubuntu.com/ubuntu bionic InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3B4FE6ACC0B21F32
Get:2 http://01.archive.ubuntu.com/ubuntu bionic-security InRelease [83.2 kB]
Err:2 http://01.archive.ubuntu.com/ubuntu bionic-security InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3B4FE6ACC0B21F32
Get:3 http://01.archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB]
Err:3 http://01.archive.ubuntu.com/ubuntu bionic-updates InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3B4FE6ACC0B21F32
Reading package lists... Done
W: GPG error: http://01.archive.ubuntu.com/ubuntu bionic InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3B4FE6ACC0B21F32
E: The repository 'http://01.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://01.archive.ubuntu.com/ubuntu bionic-security InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3B4FE6ACC0B21F32
E: The repository 'http://01.archive.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://01.archive.ubuntu.com/ubuntu bionic-updates InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY <Pub_key_here>
E: The repository 'http://01.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.

我相信所有 install 命令都因此而失败。

我只想将一切恢复正常，因为我在卸载 virtualbox、kubectl 时搞砸了。我刚刚开始熟悉它。实验反击。

我试过使用 this 替换 sources.list 以及我尝试过的其他方法。

感谢任何帮助。

Answer 1

使用类似 this:

的命令将 public 密钥添加到您的密钥环

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 3B4FE6ACC0B21F32

那么你应该运行 sudo apt-get update 正常。

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