/bin | Essential programs and commands for use by all users. |
/boot | Files that the system boot loader uses. |
/dev | Devices (CD-ROM, serial ports, etc.) and special files. |
/etc | System configuration files and global settings. |
/etc/skel | Template configuration files for individual users. |
/etc/X11 | Configuration files and information for the X Window System. |
/home | Home directories for users. |
/lib | Essential shared libraries and kernel modules. |
/mnt | Mount point for temporarily mounted file systems. |
/opt | Directory for add-on application software packages. |
/proc | Location of kernel and process information (virtual file system). |
/root | Home directory for the root user/system administrator. |
/sbin | Essential programs and commands for system boot. |
/tmp | Temporary files. |
/usr/bin | Commands and programs that are less essential for basic Unix system functionality than those in /bin but were installed with the system. |
/usr/include | Standard include files and header files for C programs. |
/usr/lib | Libraries for programming and for installed packages. |
/usr/local | Most files and data that were developed or customized on the system. |
/usr/local/bin | Locally developed or installed programs. |
/usr/local/man | Manual (help) pages for local programs. |
/usr/local/src | Source code for locally developed or installed programs. |
/usr/sbin | Additional nonessential standard system binaries. |
/usr/share | Shared (system-independent) data files. |
/usr/share/dict | Word lists. |
/usr/share/man | Manual (help) pages for standard programs. |
/usr/share/misc | Miscellaneous shared system-independent data. |
/usr/src | Source code for standard programs. |
/usr/X11R6 | X Window System, Version 11 Release 6. |
/usr/X386 | X Window System, Version 11 Release 5, on x86 platforms. |
/var | Changeable data, including system logs, temporary data from programs, and user mail storage. |
/var/account | Accounting logs, if applicable. |
/var/adm | Administrative log files and directories. |
/var/cache | Application-specific cache data. |
/var/cache/fonts | Locally generated fonts. |
/var/cache/man | Formatted versions of manual pages. |
/var/crash | Information stored from system crashes, if applicable. |
/var/games | Variable game data. |
/var/lock | Lock files created by various programs. |
/var/log | Log files and directories. |
/var/mail | User mailbox files. |
/var/run | Run-time variable files. |
/var/spool | General application spool data. |
/var/spool/cron | Contains cron and at job schedules. |
/var/spool/lpd | Line-printer daemon print queues. |
/var/spool/mail | Contains incoming mail for users. |
/var/state | Variable state information for the system. |
/var/state/editorname | Editor backup files and state information. |
/var/state/misc | Miscellaneous variable data. |
/var/tmp | Temporary files that the system keeps through reboots. |
/var/yp | Database files that the Network Information Service (NIS) uses. |