Guides & Insights
Tips on SSH, macOS development, and remote server management from the Pluto Door team.
SSH Key Management on macOS: The Complete Guide
Learn how to generate, manage, and organize SSH keys on macOS. Covers ssh-keygen, ssh-agent, config files, and best practices for secure key management.
Mars
How to Transfer Files to a Remote Server from Mac (SFTP Guide)
Learn how to transfer files between your Mac and remote servers using SFTP. Covers command-line SFTP, GUI clients, and the fastest ways to upload and download files.
Venus
The Complete Remote Development Setup for macOS in 2026
Set up the perfect remote development workflow on macOS. SSH config, terminal tools, file sync, code editors, and everything you need to develop on remote servers.
Saturn
10 SSH Config Tricks Every Developer Should Know
Master your ~/.ssh/config file with these 10 essential tricks. Jump hosts, port forwarding, keep-alive, wildcards, and more to speed up your SSH workflow.
Jupiter
How to Secure Your VPS in 10 Minutes (First-Time Setup Guide)
Essential security steps for a new VPS or cloud server. Disable root login, set up SSH keys, configure firewall, and harden your server from day one.
Neptune
How AI Terminal Assistants Are Changing Developer Productivity
AI-powered terminal assistants help developers write commands, debug errors, and automate tasks. Here's how they work and which ones are worth using in 2026.
Mercury
Permission Denied (publickey): How to Fix the Most Common SSH Error
The "Permission denied (publickey)" error is the most common SSH problem there is. Here's every cause and fix — key permissions, ssh-agent, config files, and usernames.
Pluto
Host Key Verification Failed: How to Fix It Safely
Seeing "Host key verification failed" or "REMOTE HOST IDENTIFICATION HAS CHANGED"? Here's what it means, how to fix it safely, and how to tell it isn't an attack.
Charon
SSH Connection Refused on Port 22: How to Fix It
The SSH "Connection refused" error means something actively rejected you. Here's how to diagnose it fast — SSH service, wrong port, firewall, or wrong host.
Uranus
SSH Connection Timed Out on Port 22: How to Fix It
SSH hanging then failing with "Operation timed out"? Your connection never reached the server. Here's how to fix it — cloud firewall, security groups, stale IP, and Wi-Fi.
Titan