The DragonFly directory hierarchy is fundamental to obtaining an overall understanding of the system. The most important concept to grasp is that of the root directory, ``/''. This directory is the first one mounted at boot time and it contains the base system necessary to prepare the operating system for multi-user operation. The root directory also contains mount points for every other file system that you may want to mount.
A mount point is a directory where additional file systems can
be grafted onto the root file system.
This is further described in Section 3.5.
Standard mount points include
/mnt, and /cdrom. These
directories are usually referenced to entries in the file
/etc/fstab. /etc/fstab is
a table of various file systems and mount points for reference by the
system. Most of the file systems in /etc/fstab
are mounted automatically at boot time from the script rc(8)
unless they contain the
Details can be found in Section 3.6.1.
A complete description of the file system hierarchy is available in hier(7). For now, a brief overview of the most common directories will suffice.
|/||Root directory of the file system.|
|/bin/||User utilities fundamental to both single-user and multi-user environments.|
|/boot/||Programs and configuration files used during operating system bootstrap.|
|/boot/defaults/||Default bootstrapping configuration files; see loader.conf(5).|
|/dev/||Device nodes; see intro(4).|
|/etc/||System configuration files and scripts.|
|/etc/defaults/||Default system configuration files; see rc(8).|
|/etc/mail/||Configuration files for mail transport agents such as sendmail(8).|
|/etc/namedb/||named configuration files; see named(8).|
|/etc/periodic/||Scripts that are run daily, weekly, and monthly, via cron(8); see periodic(8).|
|/etc/ppp/||ppp configuration files; see ppp(8).|
|/mnt/||Empty directory commonly used by system administrators as a temporary mount point.|
|/proc/||Process file system; see procfs(5), mount_procfs(8).|
|/root/||Home directory for the root account.|
|/sbin/||System programs and administration utilities fundamental to both single-user and multi-user environments.|
|/tmp/||Temporary files. The contents of /tmp are usually NOT preserved across a system reboot. A memory-based file system is often mounted at /tmp. This can be automated with an entry in /etc/fstab; see mfs(8).|
|/usr/||The majority of user utilities and applications.|
|/usr/bin/||Common utilities, programming tools, and applications.|
|/usr/include/||Standard C include files.|
|/usr/libdata/||Miscellaneous utility data files.|
|/usr/libexec/||System daemons & system utilities (executed by other programs).|
|/usr/local/||Local executables, libraries, etc. Within /usr/local, the general layout sketched out by hier(7) for /usr should be used. An exceptions is the man directory, which is directly under /usr/local rather than under /usr/local/share.|
|/usr/obj/||Architecture-specific target tree produced by building the /usr/src tree.|
|/usr/pkg||Used as the default destination for the files installed via the pkgsrc® tree or pkgsrc packages (optional). The configuration directory is tunable, but the default location is /usr/pkg/etc.|
|/usr/pkg/xorg/||X11R6 distribution executables, libraries, etc (optional).|
|/usr/pkgsrc||The pkgsrc tree for installing packages (optional).|
|/usr/sbin/||System daemons & system utilities (executed by users).|
|/usr/src/||BSD and/or local source files.|
|/var/||Multi-purpose log, temporary, transient, and spool files. A memory-based file system is sometimes mounted at /var. This can be automated with an entry in /etc/fstab; see mfs(8).|
|/var/log/||Miscellaneous system log files.|
|/var/mail/||User mailbox files.|
|/var/spool/||Miscellaneous printer and mail system spooling directories.|
|/var/tmp/||Temporary files. The files are usually preserved across a system reboot, unless /var is a memory-based file system.|
Contact the Documentation mailing list for comments, suggestions and questions about this document.