permission denied on a sudo command

Yet another newbie question :
Trying to configure my vr headset, I have to setup my gpu in vr mode. I installed corectrl but I can't figure how to lauch the app. Anyway, someone in a discord gave me a command to authorise apps to change the power profile. However when I run it I get this :

bazzite@bazzite:~$ sudo echo 4 > /sys/class/drm/card0/device/pp_power_profile_mode
bash: /sys/class/drm/card0/device/pp_power_profile_mode: Permission denied

bazzite@bazzite:~$ sudo echo 4 > /sys/class/drm/card0/device/pp_power_profile_mode
bash: /sys/class/drm/card0/device/pp_power_profile_mode: Permission denied

Solution

you cant sudo echo to a file
you need to echo pipe into sudo tee

echo hello | sudo tee /sys/class/foo

echo hello | sudo tee /sys/class/foo

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Bazzite•14mo ago•

3 replies

Formica

permission denied on a sudo command

bazzite@bazzite:~$ sudo echo 4 > /sys/class/drm/card0/device/pp_power_profile_mode
bash: /sys/class/drm/card0/device/pp_power_profile_mode: Permission denied

bazzite@bazzite:~$ sudo echo 4 > /sys/class/drm/card0/device/pp_power_profile_mode
bash: /sys/class/drm/card0/device/pp_power_profile_mode: Permission denied

Solution

you cant sudo echo to a file
you need to echo pipe into sudo tee

echo hello | sudo tee /sys/class/foo

echo hello | sudo tee /sys/class/foo

Jump to solution

permission denied on a sudo command

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