There are many reasons for BIND server not to work. BIND is quite old and stable open source project so if it doesn’t work it’s usually something related to configuration and less likely something due to the compilation, installation or bug in the package. Also, there are more than few uses of BIND server so configurations can vary from one use case to another.
There are some situations when you need to check size of directories on your Linux server. Usually it’s due to logging which can consume your hard disk, especially if you have heavy traffic web site or if you log some common type events. Log rotation can help but you need to configure it properly according to your hard disk size.