How to generate ssh keys without passphrase

How to generate ssh keys without passphrase

 ssh-keygen -b 4096 -t rsa -f /tmp/sshkey$(date +"%d-%m-%Y") -q -N ""

what is what? 

ssh-keygen - command to generate ssh keys

-b = size of ssh key

-t = method of cryptography (in our case: RSA)

-f = file where to save keys (public and private) 

$(date +"%d-%m-%Y")  = with timestamp 

-q= quit mode

-N "" = don't need passphrase

more reading: https://unix.stackexchange.com/questions/69314/automated-ssh-keygen-without-passphrase-how