I have problems running fbi without sudo. As user pi running

fbi -noverbose -nocomments -T 7 -1 -t 10  test.jpg
fbi -noverbose -nocomments -T 1 -1 -t 10 test.jpg

I get an error /dev/tty7: Permission denied.

tty1 and tty7 belong to group tty.

crw--w---- 1 root tty       4,  7 huhti 13 07:01 tty7

I have added user pi to groups tty and video.

sudo usermod -a -G tty pi
sudo usermod -a -G video pi
  • tty group has no read permission
    – jsotola
    Apr 13, 2018 at 6:50
  • I added read permission crw-rw---- 1 root tty. Now theres no error but nothing is displayed. fb0 has also read and write permissions.
    – JPX
    Apr 13, 2018 at 7:03
  • "Now theres no error but nothing is displayed." Cross-check with sudo, do you get the same response with same command plus sudo, or not?
    – Fabian
    Apr 13, 2018 at 13:23
  • With sudo I get same information in console than without sudo but with sudo image is displayed.
    – JPX
    Apr 16, 2018 at 4:49
  • "With sudo I get same information in console than without sudo but with sudo image is displayed." Do you mean you get the image displayed and "Permission denied" if you run sudo fbi -noverbose -nocomments -T 7 -1 -t 10 test.jpg?
    – Fabian
    Apr 16, 2018 at 15:04

1 Answer 1


This seems to be even more confusing in Raspbian than in *nix in general (and perhaps more confusing than it need be), but try this:

sudo raspi-config

go to 5 Interfacing Options

go to P6 Serial

select Yes

raspi-config responds:

The serial login shell is enabled

The serial interface is enabled

When asked if you want to reboot, answer Yes. Hope this helps; I can't test it on my RPi because it's headless.

  • Thanks but that did not help. fbi behaves like without those settings.
    – JPX
    Apr 16, 2018 at 4:50
  • So sorry... I'd try it on mine if it were connected to a monitor, but please follow up here when you solve it; the information will help someone else.
    – Seamus
    Apr 16, 2018 at 12:25

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