The Solaris UFS file system is hierarchical, starting with the root directory (/) and continuing downwards through a number of directories. The Solaris installation process enables you to install a default set of directories and uses a set of conventions to group similar types of files together. The following table provides a summary of the default Solaris file systems.
Table 37–2 The Default Solaris File Systems
The root (/) and /usr file systems are needed to run a system. Some of the most basic commands in the /usr file system (like mount) are included in the root (/) file system so that they are available when the system boots or is in single-user mode and /usr is not mounted. For more detailed information on the default directories for the root (/) and /usr file systems, see Chapter 43, UFS File System (Reference).