Setting up Passe-partout on ubuntu 16.0.4

Harvesting keys with Passe-partout

//based on: https://serverfault.com/questions/549298/retrieving-an-rsa-key-from-a-running-instance-of-apache

//Setup
//------
sudo apt-get install make
sudo apt install gcc
sudo apt-get install openssl
//make sure it's openssl 1.0.x and not 1.1.x, passe-partout doesn't support it
sudo apt-get install libssl-dev
//get passe-partout files:
git clone <cloned-repo>
//build passe-partout:
sudo ./build.sh

//Harvest the private keys from Apache2 memory:
//---------------------------------------------
//fetch apache2 main process id, via 'ps -ef|grep apache2' or 'service apache2 status'
//run passpartout as root and provide apache2 process id:
./passe-partout <apache2 pid>
//the key file will be created in current directory

//Verify:
//------
//note - the file contents will not match the private key file contents. to verify it matches you need to:
//1. run the following on the public certificate:
openssl x509 -noout -modulus -in /etc/ssl/certs/apache-selfsigned.crt  |openssl md5
//2. run the following on passe-partout's generated key file:
openssl rsa -noout -modulus -in id_rsa-0.key |openssl md5
if the 2 outputs matches - this is the correct key!