[R] Executing a telnet session from R

From: Dennis Fisher <fisher_at_plessthan.com>
Date: Sun, 06 Apr 2008 16:14:18 -0700


Colleagues

I am working in a Linux OS with R 2.6.2.

I need to execute a telnet session to another Linux machine from R, perform some operations, then return to the original computer. When I am in an R session, this is easy to accomplish by typing:

        system("telnet -l username machinename") I am then asked for my password; once that is entered, I am connected to the remote machine. I can then enter commands on the remote machine, then logout.

I would like to automate this process within a function. Obviously, I can embed the 'system' command in the function.

Questions:

1.  How do I enter the password into the command?
2.  How do I execute the commands on the other machine?
3.  Finally, how do I execute the 'logout' command (this should not  
differ from #2)?

Thanks in advance for any help on this.

Dennis

Dennis Fisher MD
P < (The "P Less Than" Company)
Phone: 1-866-PLessThan (1-866-753-7784)
Fax: 1-415-564-2220
www.PLessThan.com

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