W: GPG error: https://repo.huaweicloud.com/debian buster InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 04EE7237B7D453EC NO_PUBKEY 648ACFD622F3D138 NO_PUBKEY DCC9EFBF77E11517
E: The repository 'https://repo.huaweicloud.com/debian buster 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://repo.huaweicloud.com/debian buster-updates InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 04EE7237B7D453EC NO_PUBKEY 648ACFD622F3D138
如果debian遇到如上错误,可以先apt-key list, 然后依次把key删除，比如查询到如下数据:
pub rsa4096 2012-04-27 [SC] [expired: 2020-04-25]
A1BD 8E9D 78F7 FE5C 3E65 D8AF 8B48 AD62 4692 5553
uid [ expired] Debian Archive Automatic Signing Key (7.0/wheezy) ftpmaster@debian.org
那么执行此命令 root@npc0:~# apt-key del "A1BD 8E9D 78F7 FE5C 3E65 D8AF 8B48 AD62 4692 5553"
OK
清空完所有的key后，去https://ftp-master.debian.org/keys.html下载对应版本的密钥，怎么看当前是什么版本~~
比如/etc/apt/sources.list里面 deb https://repo.huaweicloud.com/debian/ buster main non-free contrib
其中 buster 就是相应版本，如我这下载的就是 Debian 10/buster archive signing key 的文件.
wget下载下来后，执行apt-key add archive-key-10.asc,如果有报错
he key(s) in the keyring /etc/apt/trusted.gpg are ignored as the file has an uns
那么执行 rm /etc/apt/trusted.gpg
最后执行apt-get update看看是否正常
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