scripting with telnet sessions

nass · 04-12-2010, 09:55 AM

hello everyone,
hypothetically speaking, can i write a script in which a telnet session is opened and then some more commands are forwarded to that session?

Crashbox · 04-12-2010, 11:43 AM

You can cause commands to be run every time a telnet session is started by placing the desired commands in the local telnetrc file ($HOME/.telnetrc). Check the man page for telnetrc for details.

dive · 04-12-2010, 12:33 PM

Another way of doing it is to use 'expect'.

nass · 04-12-2010, 01:01 PM

Nice!

thank you both!

jovanoti · 04-12-2010, 02:52 PM

A year ago I had to automate connection to SMTP server. I used telnet and a little bash magic.

Code:

( echo open localhost 25}

echo "ehlo example.org"
echo "mail from: test1@example.org"
echo "rcpt to: test2@example.org"
echo "data"
echo "Subject: Test Message"
echo ""
echo "."
echo "quit"

echo exit ) | telnet

You can put `sleep <seconds>' between echo statements to delay execution.