```
sudo sh -c 'echo "princess" \> /etc/hostname'
```
 
```
sudo sh -c 'echo "127.0.0.1   princess" \>\> /etc/hosts'
```
 
```
hostnamectl
```
         

```
sudo sh -c 'echo "knight" \> /etc/hostname'
```
 
```
sudo sh -c 'echo "127.0.0.1   knight" \>\> /etc/hosts'
```
 
```
hostnamectl
```