System requirements:

Prerequisites:
Operating system: system able to run JVM

Virtual machine: JVM 1.8 (from Squash TM 1.17, it is IMPERATIVE to use Java 8, Java 7 is not supported anymore)
Application Server: none (Squash TM embeds its own application server: Tomcat)
Database: MySQL 5.0+, but not MySQL 5.6, PostGres 9.1+ (Squash TM comes with an embedded H2 database for testing purpose only. H2 should not be used as production database.)
Recommended components: - Debian Jessie - MySQL 5.5+ (but not MySQL 5.6) - Mantis 1.3.0+, Jira 6 (free SOAP plugin) or Jira 6+ (commercial REST plugin) - Apache (web front end)