1. Write the dim file to the bin (you will need super user permissions)
```bash
sudo nano /usr/bin/dim
```
2. Copy and paste the following code into the file
```bash
TEMP=1900
redshift -P -O $TEMP
```

3. To run this script it will you will need to change the permissions.

```bash
sudo chmod +X /usr/bin/dim
```

4. The script should now be able to be run with the following line,
```bash
dim
```