# Libtmux.Operations.signal

- **Module:** Libtmux
- **Package:** libtmux
- **Language:** OCaml
- **Kind:** function
- **Source:** https://github.com/libtmux/libtmux-ocaml/blob/205dfda49742592b479247049d186956e4a4cfe9/lib/libtmux.mli#L1128
- **Public owner:** Libtmux
- **Page:** https://libtmux.org/en/ocaml/latest/reference/libtmux-operations-signal/

```
val signal : string -> unit Command.t
```

Signal a named tmux semaphore, releasing a waiter or retaining the signal for a later [`wait_for`](/en/ocaml/latest/reference/libtmux-operations-wait_for/). This does not signal an OS process.

## Parameters

- `arg1` (`string`)