using enter key in shell script

without pressing the enter key ..manually...

how can we read the enter key ..from the shell script..so that the script termintes automatically.

eg:

telnet a.b.c.d xxxx
now " how to read the enter key" tho terminate the script

You can read any user input using the 'read' command. If you want to do anything else, you need to explain your requirements a little better.