How do I open a file for editing?

[mak7751]

I cannot use my usb-connected-scanner with a normal user. (1) (for Ubuntu)

[For Ubuntu 8.04]

1. Open "/etc/udev/rules.d/40-basic-permissions.rules" file.
2. Edit "0664" to "0666" in "USB devices" section.

Before the edit --------------------------
# USB devices (usbfs replacement)
SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", MODE="0664"
SUBSYSTEM=="usb_device", MODE="0664"

After the edit --------------------------
# USB devices (usbfs replacement)
SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", MODE="0666"
SUBSYSTEM=="usb_device", MODE="0666"

3. Restart the OS.

I need to know how to open the file to edit it. I can find it. I just can't open it.
I would greatly appreciate some help.

[C de-Avillez (hggdh2)]

Thank you for taking the time to report this issue and helping to make Ubuntu better. Examining the information you have given us, this does not appear to be a bug report so we are closing it and converting it to a question in the support tracker. We appreciate the difficulties you are facing, but it would make more sense to raise problems you are having in the support tracker at https://answers.launchpad.net/ubuntu if you are uncertain if they are bugs. For help on reporting bugs, see https://help.ubuntu.com/community/ReportingBugs#When%20not%20to%20file%20a%20bug.