OpenSSH Installation Problem

[Chen Yingjie]

Dear all

Thanks for your advices.
I have completed installation.

Now, I have another question.

I want to ssh/sftp to the ssh server by no passphrase.

I knew it need to use ssh-agent, ssh-add to add the passphrase in the memory.

But it need to type phrase.

Is there any way to add phrase in the memory without typing phrase?

Thanks

Chen