Ubuntu

sudo apt update error and NO_PUBKEY F42ED6FBAB17C654

Asked by Godspower Oghene

I am new to ubuntu, i am trying to install ROS . However, when i run sudo apt update, i keep on getting the following errors

:~$ sudo apt update
Hit:1 http://archive.ubuntu.com/ubuntu jammy InRelease
Get:2 http://packages.ros.org/ros2/ubuntu jammy InRelease [4682 B]
Hit:3 http://archive.ubuntu.com/ubuntu jammy-updates InRelease
Hit:4 http://security.ubuntu.com/ubuntu jammy-security InRelease
Err:2 http://packages.ros.org/ros2/ubuntu jammy InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY F42ED6FBAB17C654
Hit:5 http://archive.ubuntu.com/ubuntu jammy-backports InRelease
Ign:6 https://ppa.launchpadcontent.net/nilarimogard/webupd8/ubuntu jammy InRelease
Err:7 https://ppa.launchpadcontent.net/nilarimogard/webupd8/ubuntu jammy Release
  404 Not Found [IP: 185.125.190.80 443]
Reading package lists... Done
W: http://archive.ubuntu.com/ubuntu/dists/jammy/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
W: GPG error: http://packages.ros.org/ros2/ubuntu jammy InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY F42ED6FBAB17C654
E: The repository 'http://packages.ros.org/ros2/ubuntu jammy 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.
W: http://archive.ubuntu.com/ubuntu/dists/jammy-updates/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
W: http://security.ubuntu.com/ubuntu/dists/jammy-security/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
W: http://archive.ubuntu.com/ubuntu/dists/jammy-backports/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
E: The repository 'https://ppa.launchpadcontent.net/nilarimogard/webupd8/ubuntu jammy Release' does not have 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.
philippa@DESKTOP-NSDEUND:~$ sudo sed -e '/mc3man/s/^/#/' -i /etc/apt/sources.list{.d/*,}
philippa@DESKTOP-NSDEUND:~$ sudo apt update
Hit:1 http://archive.ubuntu.com/ubuntu jammy InRelease
Hit:2 http://archive.ubuntu.com/ubuntu jammy-updates InRelease
Hit:3 http://security.ubuntu.com/ubuntu jammy-security InRelease
Hit:4 http://archive.ubuntu.com/ubuntu jammy-backports InRelease
Ign:5 https://ppa.launchpadcontent.net/nilarimogard/webupd8/ubuntu jammy InRelease
Err:6 https://ppa.launchpadcontent.net/nilarimogard/webupd8/ubuntu jammy Release
  404 Not Found [IP: 185.125.190.80 443]
Ign:7 http://packages.ros.org/ros2/ubuntu jammy InRelease
Get:7 http://packages.ros.org/ros2/ubuntu jammy InRelease [4682 B]
Err:7 http://packages.ros.org/ros2/ubuntu jammy InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY F42ED6FBAB17C654
Reading package lists... Done
E: The repository 'https://ppa.launchpadcontent.net/nilarimogard/webupd8/ubuntu jammy Release' does not have 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.
W: http://archive.ubuntu.com/ubuntu/dists/jammy/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
W: http://archive.ubuntu.com/ubuntu/dists/jammy-updates/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
W: http://security.ubuntu.com/ubuntu/dists/jammy-security/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
W: http://archive.ubuntu.com/ubuntu/dists/jammy-backports/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
W: GPG error: http://packages.ros.org/ros2/ubuntu jammy InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY F42ED6FBAB17C654
E: The repository 'http://packages.ros.org/ros2/ubuntu jammy 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.
philippa@DESKTOP-NSDEUND:~$ sudo apt update && sudo apt upgrade
Get:1 http://security.ubuntu.com/ubuntu jammy-security InRelease [110 kB]
Ign:2 https://ppa.launchpadcontent.net/nilarimogard/webupd8/ubuntu jammy InRelease
Err:3 https://ppa.launchpadcontent.net/nilarimogard/webupd8/ubuntu jammy Release
  404 Not Found [IP: 185.125.190.80 443]
Hit:4 http://archive.ubuntu.com/ubuntu jammy InRelease
Get:5 http://archive.ubuntu.com/ubuntu jammy-updates InRelease [119 kB]
Hit:6 http://archive.ubuntu.com/ubuntu jammy-backports InRelease
Get:7 http://packages.ros.org/ros2/ubuntu jammy InRelease [4682 B]
Err:7 http://packages.ros.org/ros2/ubuntu jammy InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY F42ED6FBAB17C654
Reading package lists... Done
E: The repository 'https://ppa.launchpadcontent.net/nilarimogard/webupd8/ubuntu jammy Release' does not have 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.
W: http://security.ubuntu.com/ubuntu/dists/jammy-security/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
W: http://archive.ubuntu.com/ubuntu/dists/jammy/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
W: http://archive.ubuntu.com/ubuntu/dists/jammy-updates/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
W: http://archive.ubuntu.com/ubuntu/dists/jammy-backports/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
W: GPG error: http://packages.ros.org/ros2/ubuntu jammy InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY F42ED6FBAB17C654
E: The repository 'http://packages.ros.org/ros2/ubuntu jammy 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.
philippa@DESKTOP-NSDEUND:~$

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Manfred Hampl (m-hampl) said : 		#1

1. E: The repository 'https://ppa.launchpadcontent.net/nilarimogard/webupd8/ubuntu jammy Release' does not have a Release file.

That PPA does not contain any software for the Ubuntu release that you are running, so that PPA has to be removed from your list of repository sources.

What output do you receive for the command

grep -i nilarimogard /etc/apt/sources.list /etc/apt/sources.list.d/*.list

2. E: The repository 'http://packages.ros.org/ros2/ubuntu jammy InRelease' is not signed.

Try the following command from the installation instructions of ROS:

curl -s https://raw.githubusercontent.com/ros/rosdistro/master/ros.asc | sudo apt-key add -

Can you help with this problem?

Provide an answer of your own, or ask Godspower Oghene for more information if necessary.

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