My NeroLinux was up and running untill some days ago.

When I try to start it, I get an error message telling me that I don't have permissions to access /dev/sg1 (which is my usb dvd writr). Actually I checked the permissions on /dev/sg1:

So it seems only root can access it.

My main question is:

Can I chmod 666 /dev/sg1, or will it cause a main failure? You see, there's a 'C' before the permissions itself (crw-rw----). What dooes that C mean? Will I corrupt it if I chmod 666 the archive, or there's no difference about that C?


Another thing is that I am unable to run a script in which I could see my NeroLinux key. I opened NeroLinux with root user, to gain fast access to /dev/sg1, but it was asking me the serial number, so I tried to run my keymaker script for nero. Here's the terminal output when I tried it:

I get permission denied to run that script as a root! How is this possible? And YES, I immediatly tried to chmod 777 the script and I still get the permission denied error.

Here's what I get with ls -la keymaker:

See? It's accessible and writable and everything, so what is going on?

Please answer these questions...

Thanks in advance and good evening

"Can I chmod 666 /dev/sg1, or will it cause a main failure? You see, there's a 'C' before the permissions itself (crw-rw----). What dooes that C mean? Will I corrupt it if I chmod 666 the archive, or there's no difference about that C?"

The c means that /dev/sg1 is a character device. chmod 666 will not affect the c character designation.


"I get permission denied to run that script as a root! How is this possible? And YES, I immediatly tried to chmod 777 the script and I still get the permission denied error."

Check the permissions of the directory where keymaker is located.

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Steve Stites

By that do you mean that you logged in as root, started X and then started Nero? Or did you log in as a normal user, su'ed to root from an xterm and typed the command to launch nero?

About the permissions for /dev/sg1 it looks like a detection issue. That happened to my usb floppy once. Have you upgraded anything recently that might affect ide or scsi device detection? udev, kernel or the entire distro? One idea that comes to mind is to edit your existing udev rules and add SUBSYSTEM=="block" after BUS=="scsi" in the rule to specify it as a block device. Just make sure you edit the correct line(s).

nope, the dvd writer is now working, it resolved by chmod :P

When I said I have started Nero with root, I mean I opened a terminal, su'ed and then typed 'nero' to open it as a root.

I never login as a root in X, etc... I only use terminal for root operations, the system itself does not allow me to login graphicly as a root.

Thanks for your answers.

P.S.: I am still with the permission denied problem when trying to execute the script

Wow, I copied the keymaker to my home directory and tried to execute it from my home directory, and it worked. Probably a directory permissions issue, but I gotta go now, later I'll check it.

Thanks for your help!

See ya