# tmux server-access

Source: https://libtmux.org/en/tmux/3.7c/manual/server-access/

> Change the access or read/write permission of user.

Change the access or read/write permission of user.

## Syntax

```tmux-usage
tmux server-access [-adlrw] [-t target-pane] [user]
```

## Behavior

Change the access or read/write permission of `user`. The user running the `tmux` server (its owner) and the root user cannot be changed and are always permitted access.

`-a` and `-d` are used to give or revoke access for the specified user. If the user is already attached, the `-d` flag causes their clients to be detached.

`-r` and `-w` change the permissions for `user`: `-r` makes their clients read-only and `-w` writable. `-l` lists current access permissions.

By default, the access list is empty and `tmux` creates sockets with file system permissions preventing access by any user other than the owner (and root). These permissions must be changed manually. Great care should be taken not to allow access to untrusted users even read-only.

## C implementation

Internal declarations in tmux 3.7c:

* [`cmd_server_access_entry`](https://libtmux.org/en/tmux/3.7c/reference/c-variable-cmd_server_access_entry/)
* [`cmd_server_access_exec`](https://libtmux.org/en/tmux/3.7c/reference/c-function-cmd-server-access-c-cmd_server_access_exec/)

tmux sources and license

Syntax comes from `tmux 3.7c list-commands`. See the [global options](https://libtmux.org/en/tmux/3.7c/manual/full/#DESCRIPTION) for sockets and configuration, and [command syntax and targets](https://libtmux.org/en/tmux/3.7c/manual/full/#COMMANDS).

Behavior is taken from the [tmux 3.7c manual](https://github.com/tmux/tmux/blob/79072dd1a9f5fb437a5859e362a496fd57ec0981/tmux.1).

[Command declaration](https://github.com/tmux/tmux/blob/79072dd1a9f5fb437a5859e362a496fd57ec0981/cmd-server-access.c#L37)

```
Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>

Permission to use, copy, modify, and distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
```