Overclock RPI 4

Support and Troubleshooting
1

I have a RPI 4B, 8GB, 2TB SSD. Running umbrelOS 1.4.2
I have a cooling fan and temp is 37 deg C. I would like to overclock it slightly. I had no problem doing it before by editing /boot/config.txt

When I try to edit the config.txt file, it looks like its read only without ability to save.
Can we overclock RPI4 (1.4.2)?
Is this the config file: /boot/config.txt?
How can enable editing/save on the file?

I fully understand the risk to node stability when overclocked.
Thanks

2

have you tried sudo?

3

Yes
sudo nano /boot/config.txt
I get this in red " file /boot/config.txt is unwritable"
In the config.txt there is some reference to RPI 5. Is the OS 1.4.2 for rpi4 and rpi5? I have rpi4.

I tried to change file permissions.
root@umbrel:~# chmod u+w /boot/config.txt
chmod: changing permissions of ‘/boot/config.txt’: Read-only file system