How run a telnet command on AIX server via C# program

You don't want to do this. This will raise just some serious security questions..

Maybe you want to SSH into that machine to start this job,  Here you should look into SSH.NET and SharpSSH (nuget).

For a secure invocation of this job, you need a separate account on the AIX, which can only execute that job and nothing else. Otherwise you'll introduce some further security problems.

What's your use-case? What kind of job is it?

Thanks for reply.

We have an SSIS job which pulls orders in from an externa system, formats the file and places in an import folder on the AIX server.  To get the orders imported we need to run the command in my initial post.

So we need to be able to control when thsi utility is called.

Na..

Just let a cron job check that directory every minute or so for existing files and import them. Much simpler.

TELNET / FTP / RSH / RCMD and some other classic protocols are NO-GO areas. As they require passwords to be sent unencrypted across a  network or have an explicit trust on the remote system to not lie about the current user.

Please use SSH  to access systems for issuing commands.

As ste5an + noci said, rsh/telnet have been deprecated for years.

You'll only use these if being hacked is acceptable.

Use ssh instead.