# LibTmux::Server::link_window

- **Module:** LibTmux
- **Package:** LibTmux
- **Language:** Perl
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-perl/blob/352715a4fa66a96eed7763b90daaa536aa2f121d/packages/core/lib/LibTmux/Server.pm#L1018
- **Page:** https://libtmux.org/en/perl/latest/reference/libtmux-server-link_window/

```
sub link_window($self, %args)
```

`link_window(window => Window|window_id, session => Session|session_id, index => integer?)`.

Add an association from a physical [`LibTmux::Window`](/en/perl/latest/reference/libtmux-window/) to a [`LibTmux::Session`](/en/perl/latest/reference/libtmux-session/). index is optional; conflicts remain command failures. Existing associations are preserved. Inspect new [`LibTmux::WindowLink`](/en/perl/latest/reference/libtmux-windowlink/) records through [`"snapshot"`](/en/perl/latest/reference/libtmux-server-snapshot/).

Returns `undef` after command acceptance. Performs I/O; failures propagate through [`LibTmux::X`](/en/perl/latest/reference/libtmux-x/). Captured objects are not modified.


```perl
    $server->link_window(window => $window, session => $session, index => 4);
```

## Methods

## Parameters

- `args`

## tmux command

The tmux commands behind `link_window`.

- [`display-message`](/en/tmux/latest/manual/display-message/) (daemon identity or target preflight)
- [`link-window`](/en/tmux/latest/manual/link-window/)

## tmux C API

The C declarations in tmux that implement these commands.

- [`cmd_display_message_entry`](/en/tmux/latest/reference/c-variable-cmd_display_message_entry/) (attribute)
- [`cmd_display_message_exec`](/en/tmux/latest/reference/c-function-cmd-display-message-c-cmd_display_message_exec/) (function)
- [`cmd_link_window_entry`](/en/tmux/latest/reference/c-variable-cmd_link_window_entry/) (attribute)
- [`cmd_move_window_exec`](/en/tmux/latest/reference/c-function-cmd-move-window-c-cmd_move_window_exec/) (function)

## In other ports

Link a window into another session

| Language | Equivalent |
| --- | --- |
| Python | [`libtmux.Window.link`](/en/py/latest/reference/libtmux-window-link/) (method) |
| Ruby | [`LibTmux::Session#link_window`](/en/ruby/latest/reference/libtmux-session-link_window/) (method) |
| Lua | [`libtmux.WindowLink:link`](/en/lua/latest/reference/libtmux-windowlink-link/) (method) |
| Erlang | [`tmux_window_link:link/3`](/en/erlang/latest/reference/tmux_window_link-link-3/) (function) |
| Haskell | No public Haskell equivalent is implemented; the current modules expose scalar values and version parsing. |
| TypeScript | [`window.Window.link`](/en/ts/latest/reference/window-window-link/) (method) |
| Rust | [`window.Window.link_to`](/en/rs/latest/reference/window-window-link_to/) (method) |
| Go | [`tmux.Window.Link`](/en/go/latest/reference/tmux-window-link/) (method) |
| Java | [`io.github.libtmux.Window.linkTo`](/en/java/latest/reference/io-github-libtmux-window-window-linkto/) (method) |
| C# | [`LibTmux.Window.LinkAsync`](/en/csharp/latest/reference/libtmux-window-linkasync/) (method) |
| C++ | [`libtmux::Window::link_to`](/en/cxx/latest/reference/libtmux-window-link_to/) (method) |
| Swift | [`Server.link(_:into:)`](/en/swift/latest/reference/server-link(_-into-)/) (method) |
| OCaml | [`Libtmux_unix.Client.link_window`](/en/ocaml/latest/reference/libtmux_unix-client-link_window/) (function) |

No equivalent is recorded in PowerShell, Julia, Elixir, Common Lisp, Clojure, Kotlin, Scala or F#.