#!/usr/bin/expect
set timeout 180
set host [lindex $argv 0]
set user root
# user is root here but is can be an other and after send a “su” to do serious things

set password [lindex $argv 1]
set cmd [lindex $argv 2]

# you can spawn ssh ftp, whatelses…
spawn /usr/bin/telnet $host
# keep in mind that the login strings can be other
expect “ogin: ”
send “$user\r”
expect “assword: ”
send “$password\r”
# of course the prompt can be also other
expect “root# ”
send “$cmd\r”
expect “root# ”
send “exit\r”
expect eof

– end of the script

Pascal.