Required packages:
- dnsutils
- curl

When you are configuring the package you must place the *.env file in the home directory of the user who will execute the script by copying the exemple file, then edit it :

```
cp myscript.env.example ~/myscript.env
nano ~/myscript.env
```

Moreover, you should add a job to execute some scripts in a crontab, for example it could be a good idea for the dyndns script or the renew script.