Chapter 37. NGX
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## Chapter 37. NGX

### Configuring the NGX Updater:

NGX Configuration file search order:

1. Path supplied via `__NGX_CONF_FILE` environment variable. Note: if the application's effective UID/GID does not match its actual UID/GID (if the SETUID sticky bit is set), the location specified here will not be searched.

2. `${XDG_CONFIG_HOME}/nvidia-ngx-conf.json`. Note: if the application's effective UID/GID does not match its actual UID/GID (if the SETUID sticky bit is set), the location specified here will not be searched.

3. `/usr/share/nvidia/nvidia-ngx-conf.json`

JSON Config Options:

Key | Description | Example
--- | --- | ---
`file_format_version` | The version of the config file in the following format "major.minor.patch". Values should be of type `string`. | `1.0.0`
`ngx_models_path` | The absolute path to the NGX models directory. The NGX Updater will save files here to later be read by applications which make use of NGX functionality. Values should be of type `string`. | `/usr/share/nvidia/ngx`
`allow_ngx_updater` | A boolean value which enables the NGX Updater functionality on a system, defaulting to false if non-existent. Values should be of type `boolean`. | `false`

For systems that have multiple user accounts who may run applications which make use of NGX, it may be preferable to choose a ngx_models_path which is in a shared directory. If a shared directory is chosen it is important that the NGX Updater has permissions to write into it, this can be attained either through use of setuid/setgid sticky bit, or by altering the directories permissions accordingly.

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