# server.Server.isAlive

- **Module:** server
- **Package:** libtmux
- **Language:** TypeScript
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-ts/blob/073b9d7dedad900bff6f5ec0ea47794e40225870/packages/libtmux/src/server.ts#L1610
- **Page:** https://libtmux.org/en/ts/latest/reference/server-server-isalive/

```
isAlive(): Promise<boolean>
```

Whether the tmux server is reachable.

A missing daemon, socket, or tmux executable answers false. Cancellation,
a command deadline, or an engine programming error still raises: none says
whether the server is alive.

## Examples

```ts
if (await server.isAlive()) {
  await server.snapshot();
}
```

## tmux command

The tmux commands behind `isAlive`.

- [`list-sessions`](/en/tmux/latest/manual/list-sessions/)

## tmux C API

The C declarations in tmux that implement these commands.

- [`cmd_list_sessions_entry`](/en/tmux/latest/reference/c-variable-cmd_list_sessions_entry/) (attribute)
- [`cmd_list_sessions_exec`](/en/tmux/latest/reference/c-function-cmd-list-sessions-c-cmd_list_sessions_exec/) (function)

## Guides

Pages that discuss `isAlive`.

- [Socket and servers](/en/ts/latest/topics/socket-and-servers/)

## In other ports

Whether the server is running

| Language | Equivalent |
| --- | --- |
| Python | [`libtmux.Server.is_alive`](/en/py/latest/reference/libtmux-server-is_alive/) (method) |
| Rust | [`server.Server.is_alive`](/en/rs/latest/reference/server-server-is_alive/) (method) |
| Go | [`tmux.Server.IsAlive`](/en/go/latest/reference/tmux-server-isalive/) (method) |
| Java | [`io.github.libtmux.Server.isAlive`](/en/java/latest/reference/io-github-libtmux-server-server-isalive/) (method) |
| C# | [`LibTmux.Server.IsAliveAsync`](/en/csharp/latest/reference/libtmux-server-isaliveasync/) (method) |
| C++ | [`libtmux::Server::is_alive`](/en/cxx/latest/reference/libtmux-server-is_alive/) (method) |
| Swift | [`Server.isRunning()`](/en/swift/latest/reference/server-isrunning()/) (method) |

No equivalent is recorded in Ruby, Lua, PowerShell, Julia, Elixir, Kotlin, Scala or F#.