sudo: unable to resolve host retropie

GreenHawk84

I tried to change the visible name to something else and then it started giving this message upon shutdown or restart. I changed it back to what it was but it is still doing it. I dont know if it affected anything but how do I make sure this is ok?

BuZz

What does cat /etc/hosts say - you should have an entry like

pi@retropie:~ $ cat /etc/hosts
127.0.0.1	localhost
::1		localhost ip6-localhost ip6-loopback
ff02::1		ip6-allnodes
ff02::2		ip6-allrouters

127.0.1.1	retropie

GreenHawk84

@BuZz

127.0.0.1	localhost
::1		localhost ip6-localhost ip6-loopback
ff02::1		ip6-allnodes
ff02::2		ip6-allrouters

127.0.1.1	Killer Arcade

It kept what I changed it to? All I was trying to do was change it so when I see it in the Network on Windows it comes up the name "Killer Arcade." I went in again and made sure Host Name is now "retropie" as it was but still getting the message. Still coming up "Killer Arcade" per your request.

PaulCheffus

@GreenHawk84
Hi

Did you also change /etc/hostname ?

Cheers

Paul

GreenHawk84

@PaulCheffus I do not know where/how I could change that, I only went into the settings through the UI and changed host name.

Here is an example of what I did (and tried to change back to):

Reference: https://learn.adafruit.com/running-opengl-based-games-and-emulators-on-adafruit-pitft-displays/retropie-setup

sudo raspi-config

•Under Advanced Options, change Hostname if desired (default is “retropie”) and enable SSH (for remote administration).

PaulCheffus

@GreenHawk84

Hi

That was the link to the file but if you did it via the UI I suspect it has changed.

The following command will show the contents
cat /etc/hostname

Cheers

Paul

BuZz

you can't have spaces in your hostname. Both /etc/hostname and the entry in /etc/hosts should match.

GreenHawk84

@BuZz said in sudo: unable to resolve host retropie:

you can't have spaces in your hostname. Both /etc/hostname and the entry in /etc/hosts should match.

Since I only went into one place to try and enter the name and then went back to that same place and put it back to the way it was (retropie, w/o spaces), how do I modify the data the places you are mentioning? Is it just a matter of pulling them up in the command line and changing it?

BuZz

http://www.howtogeek.com/167195/how-to-change-your-raspberry-pi-or-other-linux-devices-hostname/

GreenHawk84

Once again, thanks so much.