# server.Server.has_session

- **Module:** server.Server
- **Package:** libtmux
- **Language:** Rust
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-rs/blob/f0e37052c232636b61d095817046e6bfc8f2ca40/crates/libtmux/src/server/discovery.rs#L246
- **Page:** https://libtmux.org/en/rs/latest/reference/server-server-has_session/

```
server.Server.has_session(self, name: impl AsRef<[u8]>) -> Result<bool, Error>
```

Report whether a session with this exact name exists.

The comparison is over raw bytes, because tmux permits session names
that are not valid UTF-8.

# Errors

Returns an error when the session listing fails.