key

[email protected]:~$ sudo apt-key adv --keyserver hkps.pool.sks-keyservers.net --recv-keys 0x6B73A36E6026DFCA
[sudo] password for lwk: 
Executing: /tmp/apt-key-gpghome.WxqyKqSvSy/gpg.1.sh --keyserver hkps.pool.sks-keyservers.net --recv-keys 0x6B73A36E6026DFCA
gpg: key 6B73A36E6026DFCA: 3 signatures not checked due to missing keys
gpg: key 6B73A36E6026DFCA: public key "RabbitMQ Release Signing Key <
 
[email protected]>" imported
gpg: Total number processed: 1
gpg:               imported: 1
[email protected]:~$ 

or

[email protected]:~$ wget https://www.rabbitmq.com/rabbitmq-release-signing-key.asc
--2018-09-29 16:51:53--  https://www.rabbitmq.com/rabbitmq-release-signing-key.asc
Resolving www.rabbitmq.com (www.rabbitmq.com)... 104.20.63.197, 104.20.62.197, 2400:cb00:2048:1::6814:3ec5, ...
Connecting to www.rabbitmq.com (www.rabbitmq.com)|104.20.63.197|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: unspecified [text/plain]
Saving to: ‘rabbitmq-release-signing-key.asc’

rabbitmq-release-signing-key.asc                                [  <=>                                                                                                                                     ]   3.11K  8.88KB/s    in 0.4s    

2018-09-29 16:51:55 (8.88 KB/s) - ‘rabbitmq-release-signing-key.asc’ saved [3187]

 
[email protected]:~$ gpg --import rabbitmq-release-signing-key.asc
gpg: keybox '/home/lwk/.gnupg/pubring.kbx' created
gpg: key 6B73A36E6026DFCA: 1 signature not checked due to a missing key
gpg: /home/lwk/.gnupg/trustdb.gpg: trustdb created
gpg: key 6B73A36E6026DFCA: public key "RabbitMQ Release Signing Key <
 
[email protected]>" imported
gpg: Total number processed: 1
gpg:               imported: 1
gpg: no ultimately trusted keys found
[email protected]:~$