Reading the earlier posts, I followed the posted replies. Since I am brand new, I opted to use the Ubuntu GUI, from which I entered the Terminal. At the terminal, I entered `nano /etc/network/interfaces`. at the line `AUTO enp4s0` and `IFACE enp4s0 INET DHCP`, I changed it to read:

```
auto eth0
iface eth0 inet static
address 192.168.1.7
netmask 255.255.255.0
network 192.168.1.0 <---I guessed at this from a earlier post
gateway 198.168.1.1
dns 192.168.1.1 <---this too was a guess 

```

\*\*note that the two lines marked as guesses were added because two posts had them, while others did not. 

I then entered CTRL+X to exit. Was prompted if I wanted to save. Entered Y for yes. Return message was 

```
ERROR WRITING /etc/netwrk/interfaces: Permission denied.

```

Any assistance to get a static IP assigned would be appreciated.