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What the Hack is the Mainframe?

Connect to a mainframe, explore the system, win prizes.

Workshop Overview

  • Beginner
  • 2 - 2.5 Hours
  • Mainframe, z/OS, Workshops

Learning Objectives

  • Learn about the IBM Z Enterprise Platform
  • Build skills in z/OS
  • Run, explore, and improve code with no prior experience necessary

Have a question?

Get in touch if you have any questions regarding this workshop or MLH Localhost.

About this Workshop

Participants in this workshop will learn about IBM Z, the enterprise platform for high volume workloads and full-data encryption. They’ll log into a live system, explore the environment, and process data.

Hands-on mainframe experience

Participants will be logging into a live mainframe and performing tasks designed to build real-world skills. This hands-on experience will set participants up with the educational foundation needed to excel on this platform built specifically for business.


This workshop focuses on z/OS, an operating system favored by businesses with high requirements for availability, accuracy, and security. z/OS is the home of enterprise software, including CICS, which serves up 30 billion transactions a day.


IBM Z is the powerful enterprise computing platform that 71% of Fortune 500 companies depend on for their success. In addition to z/OS, IBM Z runs Linux, runs Docker containers, and plays well with other open solutions.

Requirements / Prerequisites

Participants will need to get connected to a system and install software needed to complete the challenges.

Required Access:

Required Software:


When you host an MLH Localhost activity, we’ll send you everything you need to run it. Here’s what we’ll send you:

The List:

Resources & Downloads

Instructions for TN3270 connection to z/OS

Instructions for SSH connection to z/OS

Data Set Allocation and Disk Storage Information

Master the Mainframe Digital Badges

Become a Recognized Master the Mainframe Facilitator

Get Started

The hackers are waiting for you.

Have a question?