apt install debootstrap apt-get install debian-keyring apt-get install debian-archive-keyring
apt install debootstrap apt install ubuntu-archive-keyring
This would not be enough to get the install scripts for the very latest release…
#slackpkg search debootstrap #sbopkg -i debootstrap
Hence fetch and install the latest (RU) debootstrap
wget http://ftp.ru.debian.org/debian/pool/main/d/debootstrap/debootstrap_1.0.116.tar.gz tar xzf debootstrap_1.0.116.tar.gz cd debootstrap-1.0.116/ make install debootstrap --version
debian keys
mkdir lia/
rsync -avz --progress keyring.debian.org::keyrings/keyrings/ lia/
mv lia/* /usr/share/keyrings/
rmdir lia/
ls -lF /usr/share/keyrings/
debian archive
...got them from a guest...
ubuntu archive only
wget http://ru.archive.ubuntu.com/ubuntu/project/ubuntu-archive-keyring.gpg wget http://ru.archive.ubuntu.com/ubuntu/project/ubuntu-archive-keyring.gpg.sig cp -f ubuntu-archive-keyring.gpg* /usr/share/keyrings/
otherwise
wget http://ru.archive.ubuntu.com/ubuntu/pool/main/u/ubuntu-keyring/ubuntu-keyring_2018.09.18.1~18.04.0.tar.gz tar xzf ubuntu-keyring_2018.09.18.1~18.04.0.tar.gz cd ubuntu-keyring-2018.09.18.1/ cp -f keyrings/* /usr/share/keyrings/
W: Cannot check Release signature; keyring file not available /usr/share/keyrings/ubuntu-archive-keyring.gpg W: Cannot check Release signature; keyring file not available /usr/share/keyrings/debian-archive-keyring.gpg
==> Fetch and deploy the keyrings as described above