Operation Manual

/tmp
This directory is used by programs that require temporary storage of les.
IMPORTANT: Cleaning up /tmp at Boot Time
Data stored in /tmp are not guaranteed to survive a system reboot. It, for
example, depends on settings in /etc/sysconfig/cron.
/usr
/usr has nothing to do with users, but is the acronym for UNIX system resources.
The data in /usr is static, read-only data that can be shared among various hosts
compliant with the Filesystem Hierarchy Standard (FHS). This directory contains
all application programs and establishes a secondary hierarchy in the le system.
KDE4 and GNOME are also located here. /usr holds a number of subdirectories,
such as /usr/bin, /usr/sbin, /usr/local, and /usr/share/doc.
/usr/bin
Contains generally accessible programs.
/usr/sbin
Contains system daemons and programs reserved for the system administrator that
are not essential for booting the system.
/usr/local
In this directory the system administrator can install local, distribution-independent
extensions.
/usr/share/doc
Holds various documentation les and the release notes for your system. In the
manual subdirectory nd an online version of this manual. If more than one lan-
guage is installed, this directory may contain versions of the manuals for different
languages.
Under packages nd the documentation included in the software packages in-
stalled on your system. For every package, a subdirectory /usr/share/doc/
packages/packagename is created that often holds README les for the
package and sometimes examples, conguration les or additional scripts.
298 Reference