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By default, the Single UNIX Specification (SUS) specifies that du is to display the file space allocated to each file and directory contained in the current directory. Links will be displayed as the size of the link file, not what is being linked to; the size of the content of directories is displayed, as expected.
UNIX file system: Introduced: with 4.2BSD: Structures; Directory contents: tables: Limits; Max volume size: 2 73 bytes (8 ZiB) Max file size ... Directory files ...
A place for files that might change frequently - especially in size, for example e-mail sent to users on the system, or process-ID lock files. /var/log: Contains system log files. /var/mail: The place where all incoming mail is stored. Users (other than root) can access their own mail only. Often, this directory is a symbolic link to /var/spool ...
The rest of the files were put into the /usr directory. [27] When they got a third drive, users' files were moved to a new directory named /home. [28] FHS was created as the FSSTND (short for "Filesystem Standard" [29]), largely based on similar standards for other Unix-like operating systems.
Allowable characters in directory entries [cc] Maximum pathname length Maximum file size Maximum volume size [cd] Max number of files AdvFS: 255 characters Any byte except NUL [ce] No limit defined [cf] 16 TiB (17.59 TB) 16 TiB (17.59 TB) ? APFS: 255 UTF-8 characters Unicode 9.0 encoded in UTF-8 [96]? 8 EiB (9.223 EB) ? 2 63 [97] Bcachefs: 255 ...
The most common special file is the directory. The layout of a directory file is defined by the filesystem used. As several filesystems are available under Unix, both native and non-native, there is no one directory file layout. A directory is marked with a d as the first letter in the mode field in the output of ls -dl [5] or stat, e.g.
3 Unix. 4 See also. ... a directory structure is the way an operating system arranges files that are ... Windows automatically scavenges this folder to keep its size ...
The maximum file, directory, and filesystem size limits grow at least proportionately with the filesystem block size up to the maximum 64 KiB block size available on ARM and PowerPC/Power ISA CPUs. Extents Extents replace the traditional block mapping scheme used by ext2 and ext3. An extent is a range of contiguous physical blocks, improving ...