dokku/docs/getting-started/install/debian.md

Debian Package Installation Notes

As of 0.3.18, dokku defaults to being installed via debian package. While certain hosts may require extra work to get running, you may optionally wish to automate the installation of dokku without the use of our bootstrap.sh bash script. The following are the steps run by said script:

curl --silent https://get.docker.io/gpg 2> /dev/null | apt-key add - 2>&1 >/dev/null
curl --silent https://packagecloud.io/gpg.key 2> /dev/null | apt-key add - 2>&1 >/dev/null

echo "deb http://get.docker.io/ubuntu docker main" > /etc/apt/sources.list.d/docker.list
echo "deb https://packagecloud.io/dokku/dokku/ubuntu/ trusty main" > /etc/apt/sources.list.d/dokku.list

sudo apt-get update > /dev/null
sudo apt-get install -qq -y linux-image-extra-`uname -r` apt-transport-https
sudo apt-get install -qq -y dokku

Unattended installation

In case you want to perform an unattended installation of dokku, this is made possible through debconf, which allows you to configure a package before installing it.

You can set any of the below options through the debconf-set-selections command, for example to enable vhost-based deployments:

echo "dokku dokku/vhost_enable boolean true" | debconf-set-selections

After setting the desired options, proceed with the installation as described above.

debconf options

Name	Type	Default	Description
dokku/web_config	boolean	true	Use web-based config for below options
dokku/vhost_enable	boolean	false	Use vhost-based deployments (e.g. .dokku.me)
dokku/hostname	string	dokku.me	Hostname, used as vhost domain and for showing app URL after deploy
dokku/key_file	string	/root/.ssh/id_rsa.pub	SSH key to add to the Dokku user (Will be ignored on dpkg-reconfigure)