Information Technology Reference
In-Depth Information
Default Solaris 9 File Systems
The disk space available for use with a Solaris 9 operating system is a collec-
tion of mounted file systems. The top directory is the location where the root
file system is mounted. The locations where other file systems are mounted,
called mount points ,are typically subdirectories of the root file system, and
normally are used to refer to the file systems themselves. For example, the file
system mounted at /usr normally is referred to as the usr file system . Table 6.2
lists the default file systems of a Solaris 9 operating system.
Table 6.2
Default File Systems
File System
Use
root ( / )
The top of the hierarchical file system tree. Contains critical system
files, such as the kernel and device drivers.
/usr
System files, such as commands and programs, used to administer
and use the system.
/home
User home directories. On some systems, it might be /export/home or
a network-based file system.
/var
System files that change or grow, such as logs, queues, and spooling
areas.
/opt
Third-party software and applications.
/tmp
Temporary files cleared each time the system boots.
/proc
Information about active processes.
All the disk-based file systems are type UFS. The two memory-based file sys-
tems ( /tmp and /proc ) are type TMPFS and PROCFS, respectively.
Because kernel files reside in the root file system and system files reside in the /usr
file system, these two file systems are required to boot a usable system. However,
the /usr file system can also be a part of the root file system and not a separate one.
File and Directory Concepts
Data stored on file systems consists of directories and files. Directories serve
as folders to arrange the files into some organized user-defined structure. In
reality, all the files and directories are stored more or less randomly on the
disk. The files and (other) directories are then referenced or linked into direc-
tories to provide the organization. In addition, there are several types of spe-
cial files that are actually interfaces to hardware devices, such as disk drives
and tape drives.
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