Create .ssh folder

rsa public key is kept in .ssh folder

Now logged in as user 'rocket' let's check all the files/folder including hidden.

ls -a

.bash_history .bash_layout .bashrc .cache .local .profile .sudo_as_admin_successful

You can see that their is no folder names '.ssh'. We need to create '.ssh' folder under user 'rocket' to keep the rsa public key.