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How can I pass carriage return to a command. I am writing a shell script whcih generates ssh key pair. It ask for input from user three times. I want to pass carriage return (ie. press Enter button) to this command. Is tehre any way?
Thanks for the reply. And yes I am using ssh-keygen command to generate ssh key pair. But I am not after creating empty passphrase. I basically want to pass NOTHING when it prompts for key name or passphrases and need to do it through a script in order to avoid manual intervention.
Hmm... maybe I'm missing something. The -N option with an empty string as argument equals to pass NOTHING when prompted for passphrase. Also when you hit return without entering a string when prompted for key name, it will create a default key, being either $HOME/.ssh/id_rsa or $HOME/.ssh/id_dsa depending on the key type, so that you can give the default name along with the -f option. If I've not understood the problem, please tell me and elaborate further.
$ ssh-keygen -N "" -t dsa
Generating public/private dsa key pair.
Enter file in which to save the key (/home/testid/.ssh/id_dsa):
Also when you hit return without entering a string when prompted for key name, it will create a default key, being either $HOME/.ssh/id_rsa or $HOME/.ssh/id_dsa depending on the key type, so that you can give the default name along with the -f option.