Glossary

Terminal Multiplexer

A tool like tmux or Zellij that runs multiple persistent terminal sessions inside one window.

A terminal multiplexer lets you run many shell sessions within a single terminal window, split them into panes, and — crucially — keep them alive when you disconnect. tmux and Zellij are the best-known examples.

Multiplexers matter for remote and long-running work: detach from a session, close your laptop, reconnect later, and your processes are still running. Some modern terminals build multiplexing in; others rely on tmux.

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Related guides on the Agents UI blog and related terms in this glossary.

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Related

Persistent Terminal Session

A terminal session that survives disconnects and restarts, preserving running processes and state.

SSH Port Forwarding

Tunneling network traffic over an SSH connection to securely reach remote services.

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