ubuntu 204 安装STUNfailed to start stun-serverserviceunit stun-serverservice mot found

It seems like the STUN server package or service is not available in the official Ubuntu 20.04 repositories. However, you can manually install a STUN server by following these steps:

Download the STUN server package from a reliable source. One popular STUN server is stunserver.
```
wget https://github.com/jselbie/stunserver/archive/master.zip
```
Unzip the downloaded package.
```
unzip master.zip
```
Navigate to the extracted directory.
```
cd stunserver-master
```
Install the required dependencies.
```
sudo apt install cmake libssl-dev
```
Generate the build files and compile the STUN server.
```
cmake .
make
```
Install the STUN server.
```
sudo make install
```
Create a systemd service unit file for the STUN server.
```
sudo nano /etc/systemd/system/stun-server.service
```

Add the following content to the file and save it:

[Unit]
Description=STUN Server
After=network.target

[Service]
ExecStart=/usr/local/bin/stunserver

[Install]
WantedBy=multi-user.target

Enable and start the STUN server service.

sudo systemctl enable stun-server.service
sudo systemctl start stun-server.service

Now, the STUN server should be installed and running on your Ubuntu 20.04 system. You can check the status of the service using the command sudo systemctl status stun-server.service

ubuntu 204 安装STUNfailed to start stun-serverserviceunit stun-serverservice mot found