# tmux_command:launch_spec/0

- **Package:** libtmux_erlang
- **Language:** Erlang
- **Kind:** typealias
- **Source:** https://github.com/libtmux/libtmux-erlang/blob/d1b6308440cf9eb8f6647e7ae434bce60e849368/apps/libtmux_erlang/src/tmux_command.erl#L74
- **Page:** https://libtmux.org/en/erlang/latest/reference/t-tmux_command-launch_spec-0/

```
-type launch_spec() ::
          default_shell |
          #{argv := [binary(), ...]} |
          #{shell := binary()}.
```

Explicit executable argv, an explicitly requested shell command, or tmux's configured default shell.