Update your “/dev” entries

If you have added new devices to your system or have done recently a major kernel upgrade (a major kernel upgrade is for example when you pass from kernel version 2.2.9 to 2.2.15 directly), it may be important to update your 7dev” entries to avoid problems related to missing devices. We can accomplish this task with the MAKEDEV script utility that scan the 7dev” directory where all devices that interfaces with drivers in the kernel are kept. A special option named “update” allow the MAKEDEV utility to create new devices that you have configured in your kernel and delete those which are no longer configured.
To update your 7dev” entries, execute the following commands:
[root@deep /]# cd /dev
[root@deep /dev]# ./MAKEDEV update