u3d

Open the project in the current directory using the correct Unity version

$ u3d

$ u3d list

$ u3d available

$ u3d install latest_stable

$ u3d install [2021.2.0f1] -p [Unity,iOS,Android]

Due to `u3d` being a non-standard command, a general synopsis cannot be provided. If `u3d` exists on your system, its synopsis would be defined by its specific script or executable. For a custom script, a typical invocation might look like:

`u3d [options] [arguments]`

To determine the actual synopsis, one would need to inspect the script itself or its documentation.

No standard parameters
    As a non-standard command, `u3d` does not have universally defined parameters. Any options or arguments would be specific to its local implementation or custom script. For example, if it were a custom script for a specific task, parameters might include input file paths, output directories, or specific operational flags determined by the script's creator.

The `u3d` command is not a standard or commonly pre-installed utility in most Linux distributions. Unlike commands such as `ls` or `grep`, `u3d` does not have a universally defined purpose or set of functionalities.

It is highly probable that `u3d` refers to one of the following:
- A custom script or alias created by a user or system administrator for a specific local task.
- A component or executable from a third-party application that uses `u3d` as its command-line interface, possibly related to 'Unity 3D' development environments (though the primary executable is usually `Unity` or `UnityEditor`).
- A typo for another command (e.g., `udisksctl`).

Without specific context, its exact behavior, options, and arguments are undefined and dependent on its local implementation.

Non-standard Nature: `u3d` is not part of standard Linux utilities, meaning its presence and behavior vary widely by system.
No Guarantees: There are no guarantees about its functionality, security, or stability without knowing its source.
Potential Conflicts: A custom `u3d` might conflict with future standard commands or other custom scripts if not carefully named.
System Dependent: Its existence and purpose are entirely dependent on how it was installed or configured on a specific Linux system.

To determine if `u3d` exists on your system and what it does, you can use `which u3d` to find its path. If found, inspecting its content (if it's a script) or consulting local documentation would be necessary to understand its purpose and usage.

The functionality of `u3d` is entirely context-dependent. If you encountered `u3d` in a specific project or environment, that context is crucial for understanding its intended use.

As `u3d` is not a standard Linux command, it does not possess a documented history of development or widespread usage within the Linux community. Any 'history' for a local `u3d` command would be specific to its creation and evolution on the system where it exists.