Linux Directory Structure
Note: Files are grouped according to purpose. Ex: commands, data files, documentation.
Parts of a Unix directory tree. See the FSSTND standard (Filesystem standard)
/ Root root The home directory for the root user home Contains the user's home directories -ftp Users include many services as listed here -httpd -samba -user1 -user2 bin Commands needed during bootup that might be needed by normal users sbin Like bin but commands are not intended for normal users. Commands run by LINUX. proc This filesystem is not on a disk. Exists in the kernels imagination (virtual). This directory Holds information about kernel parameters and system configuration. -1 A directory with info about process number 1. Each process has a directory below proc. usr Contains all commands, libraries, man pages, games and static files for normal operation. -bin Almost all user commands. some commands are in /bin or /usr/local/bin. -sbin System admin commands not needed on the root filesystem. e.g., most server programs. -include Header files for the C programming language. Should be below /user/lib for consistency. -lib Unchanging data files for programs and subsystems -local The place for locally installed software and other files. -man Manual pages -info Info documents -doc Documentation for various packages -tmp -X11R6 The X windows system files. There is a directory similar to usr below this directory. -X386 Like X11R6 but for X11 release 5 boot Files used by the bootstrap loader, LILO. Kernel images are often kept here. lib Shared libraries needed by the programs on the root filesystem -modules Loadable kernel modules, especially those needed to boot the system after disasters. dev Device files for devices such as disk drives, serial ports, etc. etc Configuration files specific to the machine. -skel When a home directory is created it is initialized with files from this directory -sysconfig Files that configure the linux system for networking, keyboard, time, and more. var Contains files that change for mail, news, printers log files, man pages, temp files -file -lib Files that change while the system is running normally -local Variable data for programs installed in /usr/local. -lock Lock files. Used by a program to indicate it is using a particular device or file -log Log files from programs such as login and syslog which logs all logins, logouts, and other system messages. -run Files that contain information about the system that is valid until the system is next booted -spool Directories for mail, printer spools, news and other spooled work. -tmp Temporary files that are large or need to exist for longer than they should in /tmp. -catman A cache for man pages that are formatted on demand mnt Mount points for temporary mounts by the system administrator. tmp Temporary files. Programs running after bootup should use /var/tmp.