출처 : https://howtoprogram.xyz/2016/11/29/install-packer-ubuntu-16-04-1-lts-xenial-xerus/

sudo apt-get install unzip
wget https://releases.hashicorp.com/packer/0.12.0/packer_0.12.0_linux_amd64.zip
unzip packer_0.12.0_linux_amd64.zip -d packer
sudo mv packer /usr/local/
export PATH="$PATH:/usr/local/packer"
source /etc/environment
packer --version

출처: https://computingforgeeks.com/how-to-install-and-use-packer/