install Azure client on ubuntu virtual machine public key is not available

Question

I am following this link to install Azure client on a Ubuntu virtual machine on Azure. This virtual machine is probably on a private network and behind a firewall.

https://docs.microsoft.com/en-us/cli/azure/install-azure-cli-apt?view=azure-cli-latest

I have tried

    curl -sL https://aka.ms/InstallAzureCLIDeb | sudo bash

and got this error:

    The following signatures couldn't be verified because the public key is not available: NO_PUBKEY EB3E94ADBE1229CF

And also tried Manual install instructions and this gives the same error on the first command

    sudo apt-get update

Then I googled the error and tried this:

    sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys EB3E94ADBE1229CF

This gives me:

    Executing: /tmp/apt-key-gpghome.weXEf8jZ7m/gpg.1.sh --keyserver keyserver.ubuntu.com --recv-keys EB3E94ADBE1229CF
    gpg: keyserver receive failed: End of file

And also tried this:

    sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys EB3E94ADBE1229CF

And got this:

    sudo: unable to resolve host -0: Bad message
    Executing: /tmp/apt-key-gpghome.DTxXTpZKKN/gpg.1.sh --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys EB3E94ADBE1229CF
    gpg: key EB3E94ADBE1229CF: 6 signatures not checked due to missing keys
    gpg: key EB3E94ADBE1229CF: "Microsoft (Release signing) <[email protected]>" not changed
    gpg: Total number processed: 1
    gpg:              unchanged: 1

I then rerun the sudo apt-get update but received the same error as before.

You mean the Networking settings of the VM? My account doesn't allow me to view that setting. — thotwielder

Sulabh Shrestha Sulabh Shrestha · Accepted Answer · 2021-02-13T11:58:18

I had the same problem just 2 days before and asked the same question too. I have found the solution btw and here it is:

Okay, after much research I found out that the problem existed only on certain Nvidia Images and not on the barebone Linux images. So I figured that there must be something wrong with the trusted key itself. So, these are the steps that I did in order to fix the issue.

sudo rm -rf /etc/apt/trusted.gpg.d/microsoft.gpg 
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys EB3E94ADBE1229CF
sudo apt-get update

Now you will be able to update the instance

Resources: [1] http://forums.debian.net/viewtopic.php?t=130558

install Azure client on ubuntu virtual machine public key is not available

1 Answers