There are five blocks on the canvas; after exporting to JSON, only nodes and connections remain. This article breaks down four terms: why the node name is the primary key, which layer of the connections array is the output index, why old node names still appear in execution records, and at the end includes five actual error messages verbatim.

The place where installing n8n gets stuck is usually not n8n, but the Docker in front of it. This post covers only four terms: image, container, volume, and port, with a set of commands you can run directly, plus six pitfalls you will actually hit—including the one that reports no error and simply leaves all workflows gone the next day.

When n8n won't start, the line where the log stops determines which command you should run. Port occupied, EADDRNOTAVAIL, ECONNREFUSED, missing SQLite module, and unable to write to the .n8n directory—five types of error messages verbatim plus corresponding checks, including the misleading line "Is another n8n already running?"

Build the first n8n workflow from a blank canvas: manually trigger creation of one data item, use Edit Fields to add the four quote fields, and use a Code node to calculate the total price including shipping. Includes workflow JSON you can paste and import directly, plus the type pitfall that turns 430 into 37060.

For the same workflow, Zapier charges by number of actions, Make charges by number of modules, and n8n counts the entire workflow as one run. I’ll use three real-world scenarios to break down the bill, then factor in self-hosting maintenance time and license restrictions, and finally lay out the cases where I don’t recommend choosing n8n.

After logging in to n8n, what each area is actually telling you: the left-side navigation, the buttons on the canvas, the inputs and outputs after double-clicking a node, and the status and millisecond values in execution records. Includes real interface screenshots, four acceptance actions, and six pitfalls every beginner will inevitably hit.

Docker, Docker Compose, and npm: the three installation methods are explained step by step: how to mount data volumes so data is not lost, why the time zone is still incorrect after being set, what causes login to keep spinning, plus four acceptance criteria for a “successful installation” and common error handling.

Explain in plain language what n8n does: what nodes, connections, and workflows are, how it differs from Zapier, Make, and writing your own scripts, what tasks are suitable to hand over to it, and how to learn it from scratch. Includes screenshots of real workflows that have run successfully.