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$ sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 6dfbcbae
Executing: gpg --ignore-time-conflict --no-options --no-default-keyring --secret-keyring /etc/apt/secring.gpg --trustdb-name /etc/apt/trustdb.gpg --keyring /etc/apt/trusted.gpg --keyserver keyserver.ubuntu.com --recv-keys 6dfbcbae
gpg: requesting key 6DFBCBAE from hkp server keyserver.ubuntu.com
gpg: keyserver timed out
gpg: keyserver receive failed: keyserver error
EDIT: To try it another way with the gpg command, I get a different error:
Code: Select all
$ sudo gpg --keyserver keyserver.ubuntu.com --recv 978228591BD3A65C
gpg: WARNING: unsafe ownership on configuration file `/home/zero/.gnupg/gpg.conf'
gpg: keyring `/home/zero/.gnupg/secring.gpg' created
gpg: keyring `/home/zero/.gnupg/pubring.gpg' created
gpg: external program calls are disabled due to unsafe options file permissions
gpg: keyserver communications error: general error
gpg: keyserver receive failed: general error