add key ssh remote host code example

Example 1: copy remote ssh key mac

cat ~/.ssh/id_rsa.pub | ssh <user>@<hostname> 'cat >> .ssh/authorized_keys && echo "Public key successfully copied"'

Example 2: ssh copy id to remote sever

1. ssh-keygen (press enter / do not enter any passwords)

2. ssh-keyscan hpc.university.edu > known_hosts (press enter)

3. ssh-copy-id [email protected] ( press Enter) #you might need some password to go through university VPN in this case , you can enter them )