How To Use SSH to Connect to a Remote Server | DigitalOcean
How to Fix "WARNING: UNPROTECTED PRIVATE KEY FILE!" on Mac and Linux
做了一个用于登录 SSH 的 USB Key,成本低至 9.9 元 - V2EX
# generate ssh key pair for current machine
ssh-keygen -t rsa
# add current machine's key to remote machine
ssh-copy-id remote_host
5.2.2. Enable root login over SSH Red Hat Enterprise Linux 6 | Red Hat Customer Portal