apt policy

apt policy docker-ce
docker-ce:
 Installed: 5:19.03.6~3-0~ubuntu-bionic
 Candidate: 5:19.03.6~3-0~ubuntu-bionic
 Version table:
*** 5:19.03.6~3-0~ubuntu-bionic 500
       500 https://download.docker.com/linux/ubuntu bionic/stable amd64 Packages
       100 /var/lib/dpkg/status
    5:19.03.5~3-0~ubuntu-bionic 500
       500 https://download.docker.com/linux/ubuntu bionic/stable amd64 Packages
    5:19.03.4~3-0~ubuntu-bionic 500
       500 https://download.docker.com/linux/ubuntu bionic/stable amd64 Packages
    5:19.03.3~3-0~ubuntu-bionic 500
       500 https://download.docker.com/linux/ubuntu bionic/stable amd64 Packages
    5:19.03.2~3-0~ubuntu-bionic 500
       500 https://download.docker.com/linux/ubuntu bionic/stable amd64 Packages
    5:19.03.1~3-0~ubuntu-bionic 500
       500 https://download.docker.com/linux/ubuntu bionic/stable amd64 Packages
    5:19.03.0~3-0~ubuntu-bionic 500
       500 https://download.docker.com/linux/ubuntu bionic/stable amd64 Packages
    5:18.09.9~3-0~ubuntu-bionic 500
       500 https://download.docker.com/linux/ubuntu bionic/stable amd64 Packages
    5:18.09.8~3-0~ubuntu-bionic 500
       500 https://download.docker.com/linux/ubuntu bionic/stable amd64 Packages
    5:18.09.7~3-0~ubuntu-bionic 500
       500 https://download.docker.com/linux/ubuntu bionic/stable amd64 Packages
    5:18.09.6~3-0~ubuntu-bionic 500
       500 https://download.docker.com/linux/ubuntu bionic/stable amd64 Packages
    5:18.09.5~3-0~ubuntu-bionic 500
       500 https://download.docker.com/linux/ubuntu bionic/stable amd64 Packages
    5:18.09.4~3-0~ubuntu-bionic 500
       500 https://download.docker.com/linux/ubuntu bionic/stable amd64 Packages
    5:18.09.3~3-0~ubuntu-bionic 500
       500 https://download.docker.com/linux/ubuntu bionic/stable amd64 Packages
    5:18.09.2~3-0~ubuntu-bionic 500
       500 https://download.docker.com/linux/ubuntu bionic/stable amd64 Packages
    5:18.09.1~3-0~ubuntu-bionic 500
       500 https://download.docker.com/linux/ubuntu bionic/stable amd64 Packages
    5:18.09.0~3-0~ubuntu-bionic 500
       500 https://download.docker.com/linux/ubuntu bionic/stable amd64 Packages
    18.06.3~ce~3-0~ubuntu 500
       500 https://download.docker.com/linux/ubuntu bionic/stable amd64 Packages
    18.06.2~ce~3-0~ubuntu 500
       500 https://download.docker.com/linux/ubuntu bionic/stable amd64 Packages
    18.06.1~ce~3-0~ubuntu 500
       500 https://download.docker.com/linux/ubuntu bionic/stable amd64 Packages
    18.06.0~ce~3-0~ubuntu 500
       500 https://download.docker.com/linux/ubuntu bionic/stable amd64 Packages
    18.03.1~ce~3-0~ubuntu 500
       500 https://download.docker.com/linux/ubuntu bionic/stable amd64 Packages

/etc/apt/apt.conf.d/

See also

• apt policy
• APT: wajig, apt-cache, add-apt-repository PPA, apt [ install | remove |purge | show | list | changelog | update | upgrade], do-release-upgrade, apt-mark, apt full-upgrade, sources.list, APT Automatic updates, unattended-upgrade, apt-transport-https, apt-get update, /etc/apt/, /etc/apt/apt.conf.d/50unattended-upgrades, /etc/apt/apt.conf.d/, /etc/apt/apt.conf.d/20auto-upgrades, apt-file, apt-utils