tmux

# tmux — Terminal Multiplexer ## Overview `tmux` keeps terminal sessions alive across SSH disconnects, splits work across multiple panes, and enables fully scriptable terminal automation. This skill covers session management, window/pane layout, keybinding patterns, and using `tmux` non-interactively from shell scripts — essential for remote servers, long-running jobs, and automated workflows. ## When to Use This Skill - Use when setting up or managing persistent terminal sessions on remote servers - Use when the user needs to run long-running processes that survive SSH disconnects - Use when scripting multi-pane terminal layouts (e.g., logs + shell + editor) - Use when automating `tmux` commands from bash scripts without user interaction ## How It Works `tmux` has three hierarchy levels: **sessions** (top level, survives disconnects), **windows** (tabs within a session), and **panes** (splits within a window). Everything is controllable from outside via `tmux <command>` or from inside via the prefix key (`Ctrl-b` by default). ### Session Management ```bash # Create a new named session tmux new-session -s work # Create detached (background) session tmux new-session -d -s work # Create detached session and start a command tmux new-session -d -s build -x 220 -y 50 "make all" # Attach to a session tmux attach -t work tmux attach # attaches to most recent session # List all sessions tmux list-sessions tmux ls # Detach from inside tmux # Prefix + d (Ctrl-b ...