I am going to try the config file.
I ran
CALL QP2TERM
touch ~/.ssh/config
chmod 600 ~/.ssh/config 
EDTF '/home/ROB/.ssh/config'
Host gdl57                            
    HostName gdl57.dekko-1            
    User rob                          
    IdentityFile ~/.ssh/rob_gdisys.pub
Which begs the question:  Do I use the private key or the public key?
Well, I tried both.  I still get prompted for the password.
So I did some more reading and tried this:
PS C:\WINDOWS\system32> Get-Service ssh-agent
Status   Name               DisplayName
------   ----               -----------
Stopped  ssh-agent          OpenSSH Authentication Agent
PS C:\WINDOWS\system32> Start-Service ssh-agent
Start-Service : Service 'OpenSSH Authentication Agent (ssh-agent)' cannot be started due to the following error:
Cannot start service ssh-agent on computer '.'.
At line:1 char:1
+ Start-Service ssh-agent
+ ~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : OpenError: (System.ServiceProcess.ServiceController:ServiceController) [Start-Service],
   ServiceCommandException
    + FullyQualifiedErrorId : CouldNotStartService,Microsoft.PowerShell.Commands.StartServiceCommand
PS C:\WINDOWS\system32> Get-Service ssh-agent | Select StartType
StartType
---------
 Disabled
PS C:\WINDOWS\system32> Get-Service -Name ssh-agent | Set-Service -StartupType Automatic
PS C:\WINDOWS\system32> Start-Service ssh-agent
PS C:\WINDOWS\system32> Get-Service ssh-agent
Status   Name               DisplayName
------   ----               -----------
Running  ssh-agent          OpenSSH Authentication Agent
Now when I try 
CALL QP2TERM
ssh gdl57
I get:
ssh: connect to host gdl57.dekko-1 port 22: Connection refused
So I asked for more detail:
ssh -vvv gdl57
  OpenSSH_8.0p1, OpenSSL 1.1.1c  28 May 2019
  debug1: Reading configuration data /home/ROB/.ssh/config
  debug1: /home/ROB/.ssh/config line 1: Applying options for gdl57
  debug1: Reading configuration data /QOpenSys/QIBM/ProdData/SC1/OpenSSH/etc/ssh_config
  debug2: resolving "gdl57.dekko-1" port 22
  debug2: ssh_connect_direct
  debug1: Connecting to gdl57.dekko-1 [10.10.9.30] port 22.
  debug1: connect to address 10.10.9.30 port 22: Connection refused
  ssh: connect to host gdl57.dekko-1 port 22: Connection refused
  $
cat ~/.ssh/known_hosts                                                                                                           
  <redacted>
  gdl57.dekko-1,10.10.9.30 ecdsa-sha2-nistp256 <redacted>
  gdl57 ecdsa-sha2-nistp256 <redacted, matches redacted information on line immediately above>
  $                                                                                                                                
Bibliography:
https://stackoverflow.com/questions/52113738/starting-ssh-agent-on-windows-10-fails-unable-to-start-ssh-agent-service-erro
https://docs.microsoft.com/en-us/windows-server/administration/openssh/openssh_keymanagement
Rob Berendt
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