Where people start with mainframes.
Mainframe101 is the home of mainframe education. Learn the systems that run the world's banks, in plain language and by doing the work.
Graduate Mainframe Engineer · 20 reputation
Welcome back, Kyle.
Zed: You stopped at the READY prompt. It's still waiting for you.
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Log in for the first time, secure your account and enter your first command.
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Everything Mainframe101 makes, for people learning mainframes from the very first word.
Zed checks your work.
Ask him anything. You see each thing he looks at as he works.
He looks at your datasets, jobs, output and users.
He tells you why something you typed didn't work.
Still stuck? He explains it another way.
You asked
Did my job work?
- Checking job HELLO
- Reading the output of JOB00014
- Reading KYLE.DEV.JCL(HELLO)
- Checking your datasets
Not yet. HELLO stopped with a JCL error before it ran.
Line 6 asks for KYLE.DEV.DATA, and that dataset doesn't exist yet. Create it, then submit HELLO again.
Mainframes run the world's banks. Learning them shouldn't start with a locked door.
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