As far as I know, Tails is based on Debian. I tried to install Docker using the instruction for Debian. But it doesn't want to add the keyamnesia@amnesia:~$ sudo apt-key adv \>        --keyserver hkp://ha.pool.sks-keyservers.net:80 \>        --recv-keys 58118E89F3A912897C070ADBF76221572C52609D[sudo] password for amnesia: Executing: gpg --ignore-time-conflict --no-options --no-default-keyring --homedir /tmp/tmp.JPiSwbg3oi --no-auto-check-trustdb --trust-model always --keyring /etc/apt/trusted.gpg --primary-keyring /etc/apt/trusted.gpg --keyring /etc/apt/trusted.gpg.d/deb.torproject.org-keyring.gpg --keyring /etc/apt/trusted.gpg.d/debian-archive-jessie-automatic.gpg --keyring /etc/apt/trusted.gpg.d/debian-archive-jessie-security-automatic.gpg --keyring /etc/apt/trusted.gpg.d/debian-archive-jessie-stable.gpg --keyring /etc/apt/trusted.gpg.d/debian-archive-squeeze-automatic.gpg --keyring /etc/apt/trusted.gpg.d/debian-archive-squeeze-stable.gpg --keyring /etc/apt/trusted.gpg.d/debian-archive-wheezy-automatic.gpg --keyring /etc/apt/trusted.gpg.d/debian-archive-wheezy-stable.gpg --keyserver hkp://ha.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609Dgpg:   2C52609D  hkp  ha.pool.sks-keyservers.netgpgkeys: HTTP fetch error 6: Could not resolve host: ha.pool.sks-keyservers.netgpg:     OpenPGP.gpg:  : 0
How to install Docker on Tails
docker;tails os