Layout of the / File System

Table E-1 shows the layout of the SunOS 5.4 / file system, which contains directories that are unique to each system.

Table E-1 /

Directory	Description
/	Root of the overall file system name space
/dev	Primary location for special files
/dev/dsk	Block disk devices
/dev/rdsk	Raw disk devices
/dev/pts	Pseudo terminal slave devices
/dev/rmt	Raw tape devices
/dev/sad	Entry points for the STREAMS Administrative Driver
/dev/term	Terminal devices
/etc	Host-specific system administrative configuration files and databases
/etc/acct	Accounting system configuration information
/etc/cron.d	Configuration information and FIFO for cron

Table E-1 /

Directory	Description
/etc/default	Default information for various programs
/etc/dfs	Configuration information for exported file systems
/etc/fs	Binaries organized by file system types for operations required before /usr is mounted
/etc/inet	Configuration files for Internet services
/etc/init.d	Scripts for transitioning among run levels
/etc/lib	Shared libraries needed during booting
/etc/lp	Configuration information for the printer subsystem
/etc/mail	Mail subsystem configuration
/etc/net	Configuration information for ti (transport independent) network services
/etc/opt	Configuration information for optional packages
/etc/rc0.d	Scripts for entering or leaving run level 0
/etc/rc1.d	Scripts for entering or leaving run level 1
/etc/rc2.d	Scripts for entering or leaving run level 2
/etc/rc3.d	Scripts for entering or leaving run level 3
/etc/rcS.d	Scripts for entering or leaving run level S
/etc/saf	Service Access Facility (SAF) files, including FIFOs
/etc/skel	Default profile scripts for new user accounts
/etc/sm	Status monitor information
/etc/sm.bak	Backup copy of status monitor information
/etc/tm	Trademark files; contents displayed at boot time
/etc/uucp	Configuration information for uucp
/export	Default root of the exported file system tree
/home	Default root of a subtree for user directories
/kernel	Subtree of loadable kernel modules, including the base kernel itself as /kernel/unix
/mnt	Temporary mount point for file systems
/opt	Root of a subtree for add-on application packages
/opt/sunwspro	Mount/installation point for unbundled language products

Table E-1 /

Directory	Description
/sbin	Essential executables used in the booting process and in manual system failure recovery
/tmp	Temporary files; cleared during boot sequence
/usr	Mount point for the /usr file system
/var	Root of a subtree of various files
/var/adm	System logging and accounting files
/var/crash	Default depository for kernel crash dumps
/var/cron	Log file for cron
/var/lp	Line printer subsystem logging information
/var/mail	Directory where users' mail is kept
/var/news	Community service messages (not to be confused with USENET-style news)
/var/nis	NIS+ databases
/var/opt	Root of a subtree for various files associated with optional software packages
/var/options	Provides package compatibility with pre-SunOS 5.0 packages
/var/preserve	Backup files for vi and ex editors
/var/sadm	Databases maintained by the software package management utilities
/var/saf	System Access Facility (SAF) logging and accounting files
/var/spool	Directories for spooled temporary files
/var/spool/cron	Spool files for cron and at
/var/spool/locks	Spooling lock files
/var/spool/lp	Line printer spool files
/var/spool/mqueue	Mail queued for delivery
/var/spool/pkg	Spooled packages
/var/spool/uucp	Queued uucp jobs
/var/spool/uucppublic	Files deposited by uucp

Table E-1 /

Directory	Description
/var/tmp	Directory for temporary files not cleared during boot sequence
/var/uucp	Log and status files for uucp
/var/yp	Databases for yp (for backward compatibility with NIS and ypbind)

Layout of the /usr File System

Table E-2 shows the layout of the /usr file system, which contains architecture-dependent and architecture-independent sharable files.

Table E-2 /usr

Directory	Description
/usr/4lib	Libraries for the binary compatibility a.out package (BCP)
/usr/bin	Location for standard system commands
/usr/bin/sunview1	SunView executables, part of BCP
/usr/ccs	The C compilation system
/usr/ccs/bin	Binaries
/usr/ccs/lib	Libraries and auxiliary files
/usr/demo	Demo programs and data
/usr/games	Game binaries and data
/usr/include	Include header files (for C programs, etc.)
/usr/kernel	additional modules
/usr/kvm	Implementation architecture-specific binaries and libraries
/usr/lib	Various program libraries, architecture-dependent databases, and binaries not invoked directly by the user
/usr/lib/acct	Accounting scripts and binaries
/usr/lib/dict	Database files for the spell command
/usr/lib/class	Scheduling class-specific directories containing executables for priocntl and dispadmin commands

Table E-2 /usr

Directory	Description
/usr/lib/font	Font description files for troff
/usr/lib/fs	File system type dependent modules; not invoked directly by the user
/usr/lib/iconv	Conversion tables for iconv
/usr/lib/libp	Profiled libraries
/usr/lib/locale	Internationalization and localization databases
/usr/lib/lp	Line printer subsystem databases and backend executables
/usr/lib/mail	Auxiliary programs for the mail subsystem
/usr/lib/netsvc	Internet network services
/usr/lib/nfs	(R) Auxiliary NFS -related programs and daemons
/usr/lib/pics	PIC archives needed to build the runtime linker
/usr/lib/refer	Preprocessor for nroff/troff
/usr/lib/sa	Scripts and commands for the system activity report package
/usr/lib/saf	Auxiliary programs and daemons related to the Service Access Facility (SAF)
/usr/lib/spell	Auxiliary spell-related programs and databases
/usr/lib/uucp	Auxiliary uucp-related programs and daemons
/usr/local	Commands local to a site
/usr/net/servers	Entry points for foreign name service requests related by the listener
/usr/oasys	Files pertaining to the optional FACE package
/usr/old	Programs that are being phased out
/usr/openwin	Mount or installation point for OpenWindows software
/usr/sadm	Various files and directories related to system administration
/usr/sadm/bin	Binaries for use by FMLI scripts
/usr/sadm/install	Executables and scripts for package management
/usr/sbin	Executables for system administration

Table E-2 /usr

Directory	Description
/usr/sbin/static	Statically linked versions of selected programs from /usr/bin and /usr/sbin; used to recover from broken dynamic linking
/usr/share	Architecture-independent databases
/usr/share/lib	Architecture-independent databases
/usr/share/lib/keytables	Keyboard layout description tables
/usr/share/lib/mailx	Help files for mailx
/usr/share/lib/nterm	Terminal tables for nroff
/usr/share/lib/pub	Various data files
/usr/share/lib/spell	Auxiliary spell-related databases and scripts
/usr/share/lib/tabset	Tab setting escape sequences
/usr/share/lib/terminfo	Terminal description files
/usr/share/lib/tmac	Macro packages for nroff and troff
/usr/share/lib/zoneinfo	Time zone information
/usr/share/src	Source code for kernel, libraries, and utilities
/usr/snadm	Files associated with Administration Tool (admintool)
/usr/ucb	Berkeley compatibility package binaries
/usr/ucbinclude	Berkeley compatibility package header files
/usr/ucblib	Berkeley compatibility package libraries
/usr/vmsys	Files pertaining to the optional FACE package