How can I access SSH?

As the subject says How can I access my SSH?
I use Putty, as recommended by DH

I’m trying to make a custom php compilation to change the php-upload limit.
I’m following the next guide:

I don’t know what to do, how can I create a SSH account?
When I create the public key and the private key what do I put in passfrace?

Please help ^^ I’m pretty new on SSH stuff

Thanks in advance

Did you look through this?

The passwordless login is optional.

They need more support help.
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