packer

 **packer install:

https://developer.hashicorp.com/packer/tutorials/docker-get-started/get-started-install-cli

For ubuntu tested ok:

curl -fsSL https://apt.releases.hashicorp.com/gpg | sudo apt-key add -

sudo apt-add-repository "deb [arch=amd64] https://apt.releases.hashicorp.com $(lsb_release -cs) main"

sudo apt-get update && sudo apt-get install packer

-----------------Jenkins docker install ubuntu 20----

sudo apt-get update

sudo apt-get install -y docker.io

sudo usermod -aG docker $USER

sudo apt-get install -y wget

wget -q -O - https://pkg.jenkins.io/debian/jenkins.io.key | sudo apt-key add -

sudo sh -c 'echo deb http://pkg.jenkins.io/debian-stable binary/ > /etc/apt/sources.list.d/jenkins.list'

sudo apt-get update

sudo apt-get install -y jenkins

sudo systemctl start jenkins

sudo systemctl enable jenkins

sudo systemctl status jenkins