Having trouble downloading updates for Ubuntu 20 (focal)

[d...@amtelco.com]

Not sure why, but just noticed today that I can't get (or check for updates)

Err:6 https://unimrcp.org/repo/apt focal Release

  Certificate verification failed: The certificate is NOT trusted. The certificate chain uses expired certificate.  Could not handshake: Error in the certificate verification. [IP: 44.237.223.163 443]

Reading package lists... Done

E: The repository 'https://unimrcp.org/repo/apt focal Release' no longer has a Release file.

N: Updating from such a repository can't be done securely, and is therefore disabled by default.

N: See apt-secure(8) manpage for repository creation and user configuration details.

/etc/apt/sources.list.d/unimrcp.list contains this line.

deb [arch=amd64] https://unimrcp.org/repo/apt/ focal main

Dan

[Arsen Chaloyan]

Hi Dan,

This problem likely relates to the expiration of the Let's encrypt root certificate which had already been installed on your system. If you bring the system uptodate, the problem will go away. The following should help:

• sudo apt-get update
• sudo apt-get install ca-certificates

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Arsen Chaloyan
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[d...@amtelco.com]

Thank you Arsen.

This did solve the problem.

Have a good day!

Dan

[d...@amtelco.com]

I have a new computer/VM that I am trying to retrieve the UniMRCP updates on.  Ubuntu 20.04.  Running into a similar problem.

sudo apt-get update
Hit:1 http://us.archive.ubuntu.com/ubuntu focal InRelease
Get:2 http://us.archive.ubuntu.com/ubuntu focal-updates InRelease [114 kB]
Get:3 http://us.archive.ubuntu.com/ubuntu focal-backports InRelease [108 kB]
Get:4 https://unimrcp.org/repo/apt focal InRelease [3,814 B]
Get:5 http://us.archive.ubuntu.com/ubuntu focal-security InRelease [114 kB]
Err:4 https://unimrcp.org/repo/apt focal InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 6CA850C34E92A9A2
Reading package lists... Done
W: GPG error: https://unimrcp.org/repo/apt focal InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 6CA850C34E92A9A2
E: The repository 'https://unimrcp.org/repo/apt focal InRelease' is not signed.

N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

I tried using the apt-key to retrieve this key but it's not working.

sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 6CA850C34E92A9A2

Executing: /tmp/apt-key-gpghome.B2ZssAV0cB/gpg.1.sh --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 6CA850C34E92A9A2
gpg: keyserver receive failed: No data

Any thoughts?

Dan

[d...@amtelco.com]

Please disregard.  I forgot to run 

wget -O - https://unimrcp.org/keys/unimrcp-gpg-key.public | sudo apt-key add -

Dan