Public Key is not available

Question

I am trying to install ROS K.netic on the Raspberry Pi 3 Model B running Raspbian GNU7Linux 8 (Jessie) following these steps .

Setting up the repositories I get this output:

Executing: gpg --ignore-time-conflict --no-options --no-default-keyring --homedir /tmp/tmp.vAO4o1tMMY --no-auto-check-trustdb --trust-model always --keyring /etc/apt/trusted.gpg --primary-keyring /etc/apt/trusted.gpg --keyserver hkp://ha.pool.sks-keyservers.net:80 --recv-key 0xB01FA11

And when trying to run a sudo apt-get update I get this error:

W: GPG error: http://packages.ros.org jessie InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5523BAEEB01FA116

Anyone had this problem adding a public key?

Answer 1

Solved it.

This manually adds the key:

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys <key number>    

sudo apt-get update

Answer 2

Also, this could fix:

sudo apt-get install debian-keyring debian-archive-keyring

sudo apt-key update

sudo apt-get update