File Attribute

File Attribute

File attributes are metadata associated with computer files that define file system behavior. Each attribute can have one of two states: set and cleared. Attributes are considered distinct from other metadata, such as dates and times, filename extensions or filesystem permissions. In addition to files, folders, volumes and other file system objects may have attributes.

Traditionally, in MS-DOS and Microsoft Windows, there have been four attributes: archive, hidden, read-only and system. Windows has added new ones. Systems derived from 4.4BSD-Lite, such as FreeBSD, NetBSD, OpenBSD, DragonFly BSD, and OS X, have sets of "system" and "user" attributes; newer versions of the Linux kernel also support a set of file attributes.

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