- Access https://keyserver.ubuntu.com
- Search for a specific name (i.e
mongodb
) - Search for a specific version.
...
pub 4096R/A15703C6 2016-01-11
uid MongoDB 3.4 Release Signing Key <packaging@mongodb.com>
sig sig3 A15703C6 2016-01-11 __________ 2018-01-10 [selfsig]
sig sig3 A15703C6 2018-01-05 __________ 2020-01-05 [selfsig]
...
- Copy the key. In this case
A15703C6
. sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv A15703C6
.echo "deb http://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.4 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.4.list