mainframe person The mainframe is back, sort of, but it's called the cloud now. You'd use ssh to connect to the cloud server's Linux command prompt, and it's also the gold standard for secure file transfers. It's not flashy software but it's stable and high quality with very few bugs. It's a must learn for cloud computing.
I'm finishing up my last contract that I have been on for 19 years. After we are through in June of 2020 it's retirement time for me. 8>) But we do use FTPS for our file transfer as we don't do cloud processing, but we have racks & racks of servers. As I retire the mainframe, which is has an MVS OS built on a Unix platform, with FLEX ES as a communication between the MVS OS and Unix. So it operates and has the feel of a mainframe but looks nothing like the mainframe of old, will be retired too. I think it has a value of about 80.00 anymore. IBM no longer supports it and parts are becoming impossible to find. 8>)
Thanks for the info though. 8>)