# Open graph image not displaying unsupported media type

**URL:** https://meta.discourse.org/t/open-graph-image-not-displaying-unsupported-media-type/69804
**Category:** Support
**Created:** [2017年九月11日 11:21 UTC](https://meta.discourse.org/t/open-graph-image-not-displaying-unsupported-media-type/69804 "2017-09-11T11:21:58Z")
**Posts on this page:** 1
**Showing post:** 6

<div class="post-metadata">

### Author: ![dustinmatlock](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/dustinmatlock/32/78358_2.png) [@dustinmatlock](https://meta.discourse.org/u/dustinmatlock)
#### Post date: [2017年九月11日 22:19 UTC](https://meta.discourse.org/t/open-graph-image-not-displaying-unsupported-media-type/69804/6 "2017-09-11T22:19:35Z")

</div>

> [@codinghorror](#):
>
> No repro, works fine on my instance (self-hosted)?

I’m hosting on Linode. Had to install the aufs module. Here’s what I followed:

> [@Install Docker with AUFS on Linode](https://meta.discourse.org/t/how-to-install-docker-with-aufs-on-linode/39831):
>
> The [30-minute Discourse installation guide](https://github.com/discourse/discourse/blob/master/docs/INSTALL-cloud.md) assumes you’ll be using Digital Ocean and makes no mention of an important requirement for Docker: If you use another hosting provider, you should really make sure that a Linux kernel feature called “[AUFS](https://docs.docker.com/engine/userguide/storagedriver/aufs-driver/)” is supported. Docker not using AUFS can cause [terrible pain](https://meta.discourse.org/t/cant-install-discourse-with-only-10-gb-disk-run-out-of-space/29149/37). If you want to use Linode, here’s how to enable AUFS support in Ubuntu (for other OSes, refer to [Linode’s guide](https://www.linode.com/docs/tools-reference/custom-kernels-distros/run-a-distribution-supplied-kernel-with-kvm) and update the instructions below accordingly: Create the Linode and pic…

On Facebook’s tool it works perfect. I only can’t figure out why the image doesn’t show on Slack.

> **[Sharing Debugger - Meta for Developers](https://developers.facebook.com/tools/debug/?q=https%3A%2F%2Fwww.haskellforum.com%2F)**

 ![48 PM](https://global.discourse-cdn.com/meta/original/3X/3/3/33f61e03c850c564ed8b25c722c65ee02c54e0e4.jpg)

---

_[View the full topic](https://meta.discourse.org/t/open-graph-image-not-displaying-unsupported-media-type/69804)._