{"id":120,"date":"2007-07-29T02:20:27","date_gmt":"2007-07-29T02:20:27","guid":{"rendered":"https:\/\/www.garfnet.org.uk\/cms\/fhs-file-hierarchy-system-on-unix-like-operating-systems-such-as-linux\/"},"modified":"2024-12-06T03:05:53","modified_gmt":"2024-12-06T03:05:53","slug":"fhs-file-hierarchy-system-on-unix-like-operating-systems-such-as-linux","status":"publish","type":"post","link":"https:\/\/garfnet.org.uk\/cms\/2007\/07\/29\/fhs-file-hierarchy-system-on-unix-like-operating-systems-such-as-linux\/","title":{"rendered":"FHS (File Hierarchy System) on Unix-like operating systems such as Linux"},"content":{"rendered":"<p><strong>The Linux file system can seem a little strange especially for those coming from an M$ Windoze background. This is my humble attempt at debunking it and perhaps making it a little easier to understand.<\/strong><\/p>\n<h2>Several main differences&#8230;<\/h2>\n<p>There are some important differences between the DOS\/Windows type file system and the system used by Unix-derived systens such as Linux and Macintosh OSX.<\/p>\n<ol>\n<li>Folder delimiter is a forwardslash&nbsp; &#8220;\/&#8221; not a backslash &#8220;\\&#8221;.<\/li>\n<li>Disk drives do not have drive letters. Instead they are mounted from within the file hierarchy system.<\/li>\n<li>File and folder names are case sensitive.<\/li>\n<li>Files and folders are hidden by adding a preceding dot.<\/li>\n<li>File and folder permissions are completely different.<\/li>\n<li>Unixy folks often refer to &#8220;folders&#8221; as &#8220;directories&#8221;.<\/li>\n<li>The shorthand to access the current user&#8217;s home folder is ~\/ In my case ~\/ is the same as \/home\/garf<\/li>\n<\/ol>\n<hr>\n<h2>Basic FHS<\/h2>\n<hr>\n<p>(<em>Note this deviates slightly from official FHS by including some Debian-based paths as well.<\/em>)<\/p>\n<hr>\n<p><strong>\/ <\/strong><br \/>\nPrimary hierarchy root and root directory of the entire file system hierarchy.<\/p>\n<hr>\n<p><strong>\/bin\/ <\/strong><br \/>\nEssential command binaries that need to be available in single user mode; for all users (e.g., cat, ls, cp).<\/p>\n<hr>\n<p><strong>\/boot\/ <\/strong><br \/>\nBoot loader files (e.g., kernels, initrd). Often a separate partition.<\/p>\n<hr>\n<p><strong>\/dev\/<\/strong><br \/>\nEssential devices (e.g., \/dev\/null).<\/p>\n<hr>\n<p><strong>\/etc\/<\/strong><br \/>\nHost-specific system-wide configuration files (the name comes from et cetera).<\/p>\n<p><strong>\/etc\/opt\/<\/strong><br \/>\nConfiguration files for \/opt\/.<\/p>\n<p><strong>\/etc\/X11\/<\/strong><br \/>\nConfiguration files for the X Window System, version 11.<\/p>\n<p><strong>\/etc\/sgml\/<\/strong><br \/>\nConfiguration files for SGML.<\/p>\n<p><strong>\/etc\/xml\/<\/strong><br \/>\nConfiguration files for XML.<\/p>\n<hr>\n<p><strong>\/home\/<\/strong><br \/>\nUsers&#8217; home directories &#8211; containing saved files, personal settings etc. Often a separate disk partition.<\/p>\n<p><strong>\/home\/garf\/<\/strong><br \/>\nWhere my stuff lives. (Not actuallly part of the official FHS &#8211; obviously)<\/p>\n<hr>\n<p><strong>\/lib\/<\/strong><br \/>\nLibraries essential for the binaries in \/bin\/ and \/sbin\/.<\/p>\n<hr>\n<p><strong>\/media\/<\/strong><br \/>\nMount points for removable media such as CD-ROMs (appeared in FHS version 2.3).<\/p>\n<hr>\n<p><strong>\/mnt\/ <\/strong><br \/>\nTemporarily mounted filesystems.<\/p>\n<hr>\n<p><strong>\/opt\/<\/strong><br \/>\nOptional application software packages.<\/p>\n<hr>\n<p><strong>\/proc\/<\/strong><br \/>\nVirtual filesystem documenting kernel and process status as text files (e.g., uptime, network).<\/p>\n<hr>\n<p><strong>\/root\/<\/strong><br \/>\nHome directory for the root user.<\/p>\n<hr>\n<p><strong>\/sbin\/<\/strong><br \/>\nEssential system binaries (e.g., init, route, ifup).<\/p>\n<hr>\n<p><strong>\/srv\/<\/strong><br \/>\nSite-specific data which is served by the system.<\/p>\n<hr>\n<p><strong>\/tmp\/<\/strong><br \/>\nTemporary files (see also \/var\/tmp).<\/p>\n<hr>\n<p><strong>\/usr\/<\/strong><br \/>\nSecondary hierarchy for user data; contains the majority of (multi-)user utilities and applications.<\/p>\n<p><strong>\/usr\/bin\/<\/strong><br \/>\nNon-essential command binaries (not needed in single user mode); for all users.<\/p>\n<p><strong>\/usr\/include\/<\/strong><br \/>\nStandard include files.<\/p>\n<p><strong>\/usr\/lib\/<\/strong><br \/>\nLibraries for the binaries in \/usr\/bin\/ and \/usr\/sbin\/.<\/p>\n<p><strong>\/usr\/sbin\/<\/strong><br \/>\nNon-essential system binaries (e.g. daemons for various network-services).<\/p>\n<p><strong>\/usr\/share\/<\/strong><br \/>\nArchitecture-independent (shared) data.<\/p>\n<p><strong>\/usr\/src\/<\/strong><br \/>\nSource code (e.g. the kernel source code with its header files).<\/p>\n<p><strong>\/usr\/X11R6\/<\/strong><br \/>\nX Window System, Version 11 Release 6.<\/p>\n<p><strong>\/usr\/local\/<\/strong><br \/>\nTertiary hierarchy for local data, specific to this host. Typically has further subfolders, eg. bin\/, lib\/, share\/.<\/p>\n<hr>\n<p><strong>\/var\/<\/strong><br \/>\nVariable files, such as logs, spool files, and temporary e-mail files.<\/p>\n<p><strong>\/var\/cache\/<\/strong><br \/>\n(debian-based systems) ccached files.<\/p>\n<p><strong>\/var\/cache\/apt\/<\/strong><br \/>\n*.deb files downloaded when getting or updating packages from repositories, e.g. when using &#8220;sudo apt-get install&#8221;.<\/p>\n<p><strong>\/var\/lock\/<\/strong><br \/>\nLock files. Files keeping track of resources currently in use.<\/p>\n<p><strong>\/var\/log\/<\/strong><br \/>\nLog files. Various logs.<\/p>\n<p><strong>\/var\/mail\/<\/strong><br \/>\nUsers&#8217; mail-boxes.<\/p>\n<p><strong>\/var\/run\/<\/strong><br \/>\nInformation about the running system since last boot (e.g. currently logged-in users and running daemons).<\/p>\n<p><strong>\/var\/spool\/<\/strong><br \/>\nSpool for tasks waiting to be processed (e.g. print queues and unread mail).<\/p>\n<p><strong>\/var\/spool\/mail\/<\/strong><br \/>\nDeprecated location for users&#8217; mail-boxes.<\/p>\n<p><strong>\/var\/tmp\/<\/strong><br \/>\nTemporary files to be preserved between reboots.<\/p>\n<p><strong>\/var\/www\/ <\/strong><br \/>\nWeb site files (not strictly part of the FHS but this is a very common location in the hierarchy).<\/p>\n<hr>\n","protected":false},"excerpt":{"rendered":"<p>The Linux file system can seem a little strange especially for those coming from an M$ Windoze background. This is my humble attempt at debunking it and perhaps making it a little easier to understand. Several main differences&#8230; There are some important differences between the DOS\/Windows type file system and the system used by Unix-derived&#8230;<\/p>\n","protected":false},"author":1,"featured_media":26708,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"_kad_post_transparent":"default","_kad_post_title":"default","_kad_post_layout":"default","_kad_post_sidebar_id":"","_kad_post_content_style":"default","_kad_post_vertical_padding":"default","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[12,6,691,18],"tags":[],"class_list":["post-120","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faq","category-journal","category-linux","category-technology"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>FHS (File Hierarchy System) on Unix-like operating systems such as Linux - GarfNet<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/garfnet.org.uk\/cms\/2007\/07\/29\/fhs-file-hierarchy-system-on-unix-like-operating-systems-such-as-linux\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"FHS (File Hierarchy System) on Unix-like operating systems such as Linux - GarfNet\" \/>\n<meta property=\"og:description\" content=\"The Linux file system can seem a little strange especially for those coming from an M$ Windoze background. 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