Introduction
This guide details the process for installing the system requirements of the Direct Certificate Discovery Tool (DCDT, or the Tool).
Hardware Requirements
| Hardware Type | Minimum Requirement | Notes |
| CPU | 1 Processing Unit @ 2.0GHz | Only a rough estimate. |
| Memory (RAM) | 3GB | Less memory is required if the pieces of software are run on different machines. |
Software Requirements
| Software Name | Minimum Version | Notes |
| Ubuntu (Server) | 12.04 LTS (Precise Pangolin) | Tested more extensively on 13.10 (Saucy Salamander) and 14.04 (Trusty Tahr). |
| Oracle Java 7 JDK + JRE | 1.7.0 | Install instructions detailed below. |
| Git CLI | 1.9.1 | Install instructions detailed below. |
| Mercurial CLI | 2.6 | Install instructions detailed below. |
| Apache Maven | 3.0 | Install instructions detailed below. |
| Apache Tomcat | 7.0 | Install instructions detailed below. |
Install Software Requirements
System
Installing the software packages detailed below requires several common system-wide utilities. They can be installed by running:
sudo apt-get install wget
Java Development Kit (JDK) & Java Runtime Environment (JRE)
In order to get the proprietary Oracle Java 7 packages, run the following:
sudo apt-get install python-software-properties (This may be necessary to use the add-apt-repository command)
sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java7-installer
sudo update-java-alternatives -s java-7-oracle
To set the JAVA_HOME environment variable for the installed JDK:
export JAVA_HOME=/usr/lib/jvm/java-7-oracle
echo "export JAVA_HOME=$JAVA_HOME" | sudo tee -a /etc/environment
To obtain the Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy Files required for unlimited strength encryption used in DCDT, run either of the following sets of commands:
sudo apt-get install oracle-java7-unlimited-jce-policy
OR
wget --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jce/7/UnlimitedJCEPolicyJDK7.zip
sudo apt-get install unzip (if not already installed)
unzip UnlimitedJCEPolicyJDK7.zip
sudo cp UnlimitedJCEPolicy/local_policy.jar $JAVA_HOME/jre/lib/security
sudo cp UnlimitedJCEPolicy/US_export_policy.jar $JAVA_HOME/jre/lib/security
Git CLI
Run the following:
Mercurial CLI
Run the following:
sudo apt-get install mercurial
Apache Maven
Run the following:
sudo apt-get install maven
Apache Tomcat
Run the following:
sudo apt-get install tomcat7 tomcat7-admin