Finally got the binaries working for z/OS 1.2 USS .... sorta. I can go into OMVS shell under TSO, do an ssh into the same system, and get logged right in, no problems.
If I try to ssh (from the same OMVS shell) to my RH7.2 Linux system, I get: ssh_dss_verify: signature incorrect key_verify failed for server_host_key ..... then it terminates the session. What does it mean, 'signature incorrect'? Thanks, Paul