Recently we migrated to RHEL4es from RH8. We are using a line printer on the server. But whenever the server is restarted the /dev/lp0 (which we use to printer) permissions are getting changed and for every reboot we have are changing the permissions by using chmod 777 /dev/lp0 through root. When we kept this command in bash profile, whenever we restart the server it is giving the error 'command not authorised chmod 777 /dev/lp0' but it is changing the /dev/lp0 permissions to 777 and without any problem we are using the printer. How to overcome the error message?

see in /etc/udev ...
There, you 'll be able to force access rights

i saw /etc/udev there udev.conf... but i am unable to understand how to force /dev/lp0 to 777 permissions. I kept chmod 777 /dev/lp0 in /etc/profile. But Whenever i login it is giving error as i told earlier. My question is it safe to keep this command in roots bash profile. We were told that not to change roots bash profile. Is it safe or not?