In redhat el5 ,
GHD IV Pink Straighteners, the access to serial port ttyS0,
GHD Purple Straighteners, always reported permisson denied,
GHD Hair Straightener, namely / dev/ttyS0 the file permissions are 0660 ,
GHD IV Straighteners, 0666 tin be modified ,
GHD Pink Limited Edition, but the system will automatically restart and then into 0660 ,
GHD IV Salon Straighteners, where apt change?
google an answer :
/ etc/udev/rules.d/50-udev.rules
26 KERNEL ==