via apt-key
:
# curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -
OK
# apt-get update
Ign:1 http://deb.debian.org/debian stretch InRelease
Hit:2 http://security.debian.org stretch/updates InRelease
Hit:3 http://deb.debian.org/debian stretch-updates InRelease
Hit:4 http://deb.debian.org/debian stretch-backports InRelease
Hit:5 http://deb.debian.org/debian stretch Release
Get:6 http://packages.cloud.google.com/apt cloud-sdk-stretch InRelease [6,377 B]
Get:7 http://packages.cloud.google.com/apt google-compute-engine-stretch-stable InRelease [3,843 B]
Ign:8 https://artifacts.elastic.co/packages/6.x/apt stable InRelease
Get:9 http://packages.cloud.google.com/apt google-cloud-packages-archive-keyring-stretch InRelease [3,876 B]
Hit:10 https://artifacts.elastic.co/packages/6.x/apt stable Release
Hit:12 https://download.docker.com/linux/debian stretch InRelease
Get:13 http://packages.cloud.google.com/apt cloud-sdk-stretch/main amd64 Packages [32.5 kB]
Get:14 http://packages.cloud.google.com/apt google-cloud-packages-archive-keyring-stretch/main amd64 Packages [380 B]
Fetched 32.9 kB in 0s (37.8 kB/s)
Reading package lists... Done
#