Shell not working on MacOS

[Bob Sneidar]

I seem to remember something about this floating by a few years ago, but I can enter this command in terminal: 

telnet mysql.iotecdigital.com 8086

I will get a response of some sort if the server is listening on that port, or else after it times out it will tell me. 

If I use that command in a shell call from a script however I get the error: 

/bin/sh: line 1: telnet: command not found

I believe there was some talk about the default shell changing, but when I check the terminal shell it is /bin/sh and so is the shellCommand property. Why is shell not working??

Also as an aside, can I change the timeout? If I don’t get a response on 5 seconds, the server is not listening or I cannot get to it. 

Bob S