Everything Setting the Permissions for the Scanner If you want multiple user accounts to be able to access your scanner, you must modify the permissions on the device driver. How to change the permissions on the scanner On a command line, type the following: chmod 666 /dev/sga /dev/sga must represent the device driver of your scanner. How to set the permissions on the scanner each time you boot Open /etc/rc.d/rc.local in a text editor. Add the following line: chmod 666 /dev/sga Save and close the file. t and replace it with your own content.