Determine the folder containing <file name>.pub

cd ~/.ssh or cd /home/<username>/.ssh

Run command to generate SSH with specific email.

sudo ssh-keygen -t rsa -b 4096 -C "[email protected]"

Re-check email registered from SSH file.

sudo nano id_rsa.pub

To access SSH from client side.

sudo chmod -R 777 <your key SSH> && ssh -i ~/.ssh/<your key SSH> <your IP>