Monitoring Filesystem Usage

FreeBSD’s filesystem is a single large directory hierarchy beginning at /, the root level. Each partition of your hard disk (or disks) is assigned its own local hierarchy, and the partitions are attached to FreeBSD’s filesystem structure at different designated mount points. To keep an eye on how much disk space is being used by your data, you need to look at each mounted filesystem in turn, beginning at each one’s mount point.

The idea of mount points is an aspect of UNIX-style operating systems that is quite foreign to Windows users. In Windows/DOS, each disk in your system is assigned a drive letter (such as C:), and each drive has its own independent filesystem. For example, a machine with two hard drives and a ...

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