mkfifo

Create a named pipe

low risk

interactive breakdown — edit the command and press Explain
$ 
What it does

Makes a FIFO that processes can use for inter-process communication.

Examples
mkfifo /tmp/pipeCreate a pipe · explain & risk-check →
cat /tmp/pipeRead from it (blocks until a writer appears) · explain & risk-check →
Related
tee
Open the full explainer →More in Files & Archives

Reference text is hand-written and may be incomplete — check man mkfifo for your version. Test destructive commands on a non-production system first.