name : ubuntu-keyring.list /. /etc /etc/apt /etc/apt/trusted.gpg.d /etc/apt/trusted.gpg.d/ubuntu-keyring-2012-cdimage.gpg /etc/apt/trusted.gpg.d/ubuntu-keyring-2018-archive.gpg /usr /usr/share /usr/share/doc /usr/share/doc/ubuntu-keyring /usr/share/doc/ubuntu-keyring/changelog.gz /usr/share/doc/ubuntu-keyring/copyright /usr/share/keyrings /usr/share/keyrings/ubuntu-archive-keyring.gpg /usr/share/keyrings/ubuntu-archive-removed-keys.gpg /usr/share/keyrings/ubuntu-cloudimage-keyring.gpg /usr/share/keyrings/ubuntu-cloudimage-removed-keys.gpg /usr/share/keyrings/ubuntu-master-keyring.gpg