SSH & Remote Administration

Stop manually juggling SSH keys across a dozen servers

🧩 The Challenge

Setting up a new server and manually scp-ing your public key around feels like a task from 2004, and I’m always terrified I’ll accidentally overwrite an existing authorized_keys file. It’s a tedious way to lose twenty minutes of your life.

💡 The Fix

Use the built-in tool designed specifically for this purpose to push your key safely without messing with file permissions or overwriting stuff by mistake. You’ll save yourself the headache of manually editing text files on remote hosts.

ssh-copy-id -i ~/.ssh/id_rsa.pub user@remote-host

⚙️ Why It Works

This utility handles the entire handshake for you, automatically appending the key to the remote authorized_keys file while ensuring the directory permissions are tight enough to keep sshd happy. It beats the hell out of doing it by hand with cat and redirection.

🚀 Pro-Tip: If your keys have non-standard names, you can specify them explicitly in your ~/.ssh/config file using the IdentityFile directive to save even more typing.

Linux Tips & Tricks | © ngelinux.com | 10/16/2026