uechi.io/source/_posts/2017/x11forward.md
2021-06-06 21:56:40 +09:00

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---
title: Forward X11 window over SSH
date: 2017-06-16 00:00:00 +09:00
redirect_from: "/blog/2017/06/16/x11forward"
---
![](/uploads/x11-plot.png)
# Installation
## Remote
### Arch Linux
```bash
pacman -S xorg-xauth xorg-fonts-100dpi xorg-xeyes
```
### Ubuntu 16.04
Make sure you have installed SSH, X11 and xAuth on a remote server.
```
sudo apt install -y xorg xauth openssh
sudo sed -i '/ForwardX11/s/.*/ForwardX11 yes/' /etc/ssh/sshd_config
sudo service ssh restart
```
## Client (macOS Big Sur)
You also need to have X11 on your local machine.
```
brew install xquartz # install X11
ssh -X <remote>
$ xeyes # verify you have X11
```
You might want to restart macOS if `$DISPLAY` have empty value.
# Plot with matplotlib
Plot a simple graph remotely on Ubuntu 16.04:
```python
import matplotlib.pyplot as plt
plt.plot([1, 2, 3])
plt.show()
```
If you can't see any window, add **backend** settings to `~/.config/matplotlib/matplotlibrc`.
```ini
backend: TkAgg
```
or just add few lines to change the backend explicitly:
```python
import matplotlib
matplotlib.use('TkAgg')
import matplotlib.pyplot as plt
...
```