Public Key issue?

[pedrom34]

Creating a bug report/issue:

Required Information:

• DietPi Version | 159
• SBC Device | RPi 2 Model B (armv71)
• Power supply used : 5v 2.5A
• SD card used : Sandisk ultra 32Gb
• Distro (EG: Jessie) | Linux DietPi 4.9.62-v7+ Fix for dumb or unset TERM #2 SMP Fri Nov 17 23:52:26 GMT 2017 armv7l GNU/Linux

Additional Information (if applicable):

Fresh install. Some dietpi software installed.
COPS installed according to the official HowTo, and working.
On the use of apt-get update

Expected behaviour:

update

Actual behaviour:

W: GPG error: http://download.mono-project.com/repo/debian stretch InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A6A19B38D3D831EF
W: The repository 'http://download.mono-project.com/repo/debian stretch InRelease' is not signed.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.

Steps to reproduce:

just apt-get update

[Fourdee]

@pedrom34

Thanks for the report 👍

We'll check the code, however, i'll flag this is low priority due to it being a warning, which will not effect the operation of repo.

[pedrom34]

Thanks. ☺️

[Fourdee]

@pedrom34

Lets check mono is installed via dietpi-software, please paste results:

dietpi-software list | grep mono

If it reports =2, or you installed mono outside of DietPi, try re-adding the key:

apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
apt-get update

[pedrom34]

id 150 | =2 | mono: runtime libraries and repo |

So I did:
apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF

and got:
Executing: /tmp/apt-key-gpghome.xr14d7xmGq/gpg.1.sh --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF gpg: failed to start the dirmngr '/usr/bin/dirmngr': No such file or directory gpg: connecting dirmngr at '/run/user/0/gnupg/d.t8z1iyjmdadjsz5893iwrw5n/S.dirmngr' failed: No such file or directory gpg: keyserver receive failed: No dirmngr

[MichaIng]

@pedrom34

• First of all there seems to be a special Raspbian repo: https://download.mono-project.com/repo/debian/dists/raspbianstretch/
• And it is available via https, as you can see.
• I would suggest to add it to souces as: deb https://download.mono-project.com/repo/debian raspbianstretch main
• Just found for verification: http://www.mono-project.com/download/#download-lin-raspbian
• Just to sort out: The package gnupg is installed right? And as I see dirmngr is asked for, which is recommendation of (so by default installed together with) gnupg, so please also verify that it's installed.
• To access the repo via https, also apt-transport-https and ca-certificates are needed.

[pedrom34]

Hi @MichaIng

gnupg was installed, dirmngr was not. With:

apt-get install dirmngr
apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
echo "deb http://download.mono-project.com/repo/debian raspbianstretch main" | sudo tee /etc/apt/sources.list.d/mono-official.list
apt-get update

problem is solved. But why dirmngr wasn't installed?

[Fourdee]

Notes:

• https://packages.debian.org/stretch/dirmngr

Tried this on XU4 Jessie, seems fine without dirmngr:

root@DietPi:~# dpkg -l | grep dirmngr
root@DietPi:~#

root@DietPi:~# apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
Executing: gpg --ignore-time-conflict --no-options --no-default-keyring --homedir /tmp/tmp.kPhYCtoJvW --no-auto-check-trustdb --trust-model always --keyring /etc/apt/trusted.gpg --primary-keyring /etc/apt/trusted.gpg --keyring /etc/apt/trusted.gpg.d/debian-archive-jessie-automatic.gpg --keyring /etc/apt/trusted.gpg.d/debian-archive-jessie-security-automatic.gpg --keyring /etc/apt/trusted.gpg.d/debian-archive-jessie-stable.gpg --keyring /etc/apt/trusted.gpg.d/debian-archive-stretch-automatic.gpg --keyring /etc/apt/trusted.gpg.d/debian-archive-stretch-security-automatic.gpg --keyring /etc/apt/trusted.gpg.d/debian-archive-stretch-stable.gpg --keyring /etc/apt/trusted.gpg.d/debian-archive-wheezy-automatic.gpg --keyring /etc/apt/trusted.gpg.d/debian-archive-wheezy-stable.gpg --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
gpg: requesting key D3D831EF from hkp server keyserver.ubuntu.com
gpg: key D3D831EF: public key "Xamarin Public Jenkins (auto-signing) <[email protected]>" imported
gpg: Total number processed: 1
gpg:               imported: 1  (RSA: 1)

[Fourdee]

General | Resolved multiple issues with failed GNU key management during APT installs from non-standard repos. Dirmngr is now installed on all DietPi systems by default: https://github.com/Fourdee/DietPi/issues/1388

Marking as completed.

[clarky0000]

Im having this issue while trying to install Sonarr. I'm running Dietpi version 159 also. I see you say
Dirmngr is now installed on all DietPi systems by default
Can I update my existing version? If so how? Or do I have to rebuild from a new image?
Thanks in advance
clarky

[pedrom34]

You have go from scratch to switch from v159 to v6.X.

[Fourdee]

@clarky0000

Please see the v6.x FAQ for more information:
https://github.com/Fourdee/DietPi/issues/1355