# tmux.Session.Lock

- **Module:** tmux.Session
- **Package:** github.com/libtmux/libtmux-go/tmux
- **Language:** Go
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-go/blob/52968a3181c1c9e6d1b26c565d4b170968ae61c0/tmux/server_clients.go#L288
- **Page:** https://libtmux.org/en/go/latest/reference/tmux-session-lock/

```
tmux.Session.Lock(ctx: context.Context) -> error
```

Lock locks every client attached to the session identified by this handle's stable ID. Cancellation does not prove that tmux did not lock a client.