Beginners • Re: How do I change a read only Config.txt file?

have you tried using sudo? (superuser privs?)

sudo nano /boot/firmware/config.txt

CTRL-o write the output file
CTRL-x exits.

and I'd recommend buying another SD card (32G, rated A1) so you will be able to have a backup (using SD card copier accessory)

Have fun!

note: the way to make the SD card read-only is the "overlay file system", but i doubt that has been done.
if you want to check, use menu "preferences - control centre - performance" and check that "overlay file system" is NOT on (configure) .

Statistics: Posted by terribleted — Thu Jan 01, 2026 3:43 pm

---