$ podman run --rm -ti eilandert/ubuntu-base:rolling bash
root@f43185bab6ef:/# apt-get update
Get:1 http://deb.paranoid.nl hirsute InRelease [3646 B]
Get:2 http://ppa.launchpad.net/ondrej/php/ubuntu groovy InRelease [23.9 kB]
Get:3 http://archive.ubuntu.com/ubuntu hirsute InRelease [269 kB]
Err:1 http://deb.paranoid.nl hirsute InRelease
gpgv, gpgv2 or gpgv1 required for verification, but neither seems installed
Get:4 http://archive.ubuntu.com/ubuntu hirsute-updates InRelease [109 kB]
Get:5 http://archive.ubuntu.com/ubuntu hirsute-backports InRelease [90.7 kB]
Ign:2 http://ppa.launchpad.net/ondrej/php/ubuntu groovy InRelease
Get:6 http://security.ubuntu.com/ubuntu hirsute-security InRelease [101 kB]
Get:7 http://ppa.launchpad.net/ondrej/php/ubuntu groovy/main amd64 Packages [147 kB]
Err:3 http://archive.ubuntu.com/ubuntu hirsute InRelease
gpgv, gpgv2 or gpgv1 required for verification, but neither seems installed
Err:4 http://archive.ubuntu.com/ubuntu hirsute-updates InRelease
gpgv, gpgv2 or gpgv1 required for verification, but neither seems installed
Err:5 http://archive.ubuntu.com/ubuntu hirsute-backports InRelease
gpgv, gpgv2 or gpgv1 required for verification, but neither seems installed
Err:6 http://security.ubuntu.com/ubuntu hirsute-security InRelease
gpgv, gpgv2 or gpgv1 required for verification, but neither seems installed
Reading package lists... Done
W: GPG error: http://deb.paranoid.nl hirsute InRelease: gpgv, gpgv2 or gpgv1 required for verification, but neither seems installed
E: The repository 'http://deb.paranoid.nl hirsute 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: GPG error: http://ppa.launchpad.net/ondrej/php/ubuntu groovy InRelease: gpgv, gpgv2 or gpgv1 required for verification, but neither seems installed
W: GPG error: http://archive.ubuntu.com/ubuntu hirsute InRelease: gpgv, gpgv2 or gpgv1 required for verification, but neither seems installed
E: The repository 'http://archive.ubuntu.com/ubuntu hirsute 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: GPG error: http://archive.ubuntu.com/ubuntu hirsute-updates InRelease: gpgv, gpgv2 or gpgv1 required for verification, but neither seems installed
E: The repository 'http://archive.ubuntu.com/ubuntu hirsute-updates 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: GPG error: http://archive.ubuntu.com/ubuntu hirsute-backports InRelease: gpgv, gpgv2 or gpgv1 required for verification, but neither seems installed
E: The repository 'http://archive.ubuntu.com/ubuntu hirsute-backports 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: GPG error: http://security.ubuntu.com/ubuntu hirsute-security InRelease: gpgv, gpgv2 or gpgv1 required for verification, but neither seems installed
E: The repository 'http://security.ubuntu.com/ubuntu hirsute-security 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.