3. /usr: The Big One /var: location (Web hosting india)
3. /usr: The Big One /var: location for data which may be modified in real time by programs (such as mail servers, audit programs, print servers, etc.). Variable. Its various subdirectories may be shareable or unshareable. 3. /usr: The Big One The /usr directory is the main application-storage directory. The binary files in this directory are not required for system start-up or maintenance, so the /usr hierarchy may be, and often is, located on a separate file system. Because of its (usually) large size, /usr has its own hierarchy of sub-directories. We will mention just a few: /usr/X11R6: the entire X Window System hierarchy. All binaries and libraries required for the operation of X (including the X servers) must be located here. The /usr/X11R6/lib/X11 directory contains all aspects of X’s configuration which do not vary from one computer to another. Specific configurations for each computer should go in /etc/X11. /usr/bin: contains the majority of the system’s binaries. Any binary program which isn’t necessary for the maintenance of the system and isn’t a system administration program must be located in this directory. The only exceptions are programs you compile and install yourself, which must be located in /usr/local. /usr/lib: contains all the necessary libraries to run programs located in /usr/binand /usr/sbin. There is also a /usr/lib/X11symbolic link pointing to /usr/X11R6/lib/X11, the directory which contains the X Window System 1 libraries (but only if X is installed). /usr/local: this is where you must install any applications you compile from source. The installation program should create the necessary hierarchy. /usr/share: this directory contains all read-only, architecture-independent data required by applications in /usr. Among other things, you will find zone and location information (zoneinfo and locale). Let’s also mention the /usr/share/doc and /usr/share/man directories, which respectively contain application documentation and the system’s manual pages. Please note that Mandriva Linux now uses Xorg instead of X Window System as the default X Window system.