Question: System Settings can be run from the launcher (pinned by default), the Dash, or the power cog. But what command would I enter in a terminal window if I want to run it from there?

Answer: 
if you run `gnome-control-center` and get `command not found`, you can install it with:

```
sudo apt install gnome-control-center

```
One thing no one mentions in this is if you run it from the command line you are likely to encounter errors because some environmental variables aren't being used.

First thing, you shouldn't need sudo to run the control center, but if you do make sure you run it as your user.

```
sudo -i gnome-control-center

```

Also if you run gnome-control-center without sudo it gives permission denied notes.

```
gnome-control-center
/sys/firmware/dmi/tables/smbios_entry_point: Permission denied
/dev/mem: Permission denied

```

So it is useful to know how to run it without running into issues if you are debugging something.