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  2. File-system permissions - Wikipedia

    en.wikipedia.org/wiki/File-system_permissions

    Most file systems include attributes of files and directories that control the ability of users to read, change, navigate, and execute the contents of the file system. In some cases, menu options or functions may be made visible or hidden depending on a user's permission level; this kind of user interface is referred to as permission-driven.

  3. Copy-on-write - Wikipedia

    en.wikipedia.org/wiki/Copy-on-write

    Copy-on-write can be implemented efficiently using the page table by marking certain pages of memory as read-only and keeping a count of the number of references to the page. When data is written to these pages, the operating-system kernel intercepts the write attempt and allocates a new physical page, initialized with the copy-on-write data ...

  4. UnionFS - Wikipedia

    en.wikipedia.org/wiki/UnionFS

    The different branches may be either read-only or read/write file systems, so that writes to the virtual, merged copy are directed to a specific real file system. This allows a file system to appear as writable, but without actually allowing writes to change the file system, also known as copy-on-write.

  5. Microsoft basic data partition - Wikipedia

    en.wikipedia.org/wiki/Microsoft_basic_data_partition

    The volume is read-only and may not be mounted read-write. ... when using basic disk ... partition as Windows prior to introduction of a Linux specific Data ...

  6. File attribute - Wikipedia

    en.wikipedia.org/wiki/File_attribute

    Windows PowerShell, which has become a component of Windows 7 and later, features two commands that can read and write attributes: Get-ItemProperty and Set-ItemProperty. [10] To change an attribute on a file on Windows NT, the user must have appropriate file system permissions known as Write Attributes and Write Extended Attributes. [11]

  7. chattr - Wikipedia

    en.wikipedia.org/wiki/Chattr

    chattr is the command in Linux that allows a user to set certain attributes of a file. lsattr is the command that displays the attributes of a file.. Most BSD-like systems, including macOS, have always had an analogous chflags command to set the attributes, but no command specifically meant to display them; specific options to the ls command are used instead.

  8. FAT filesystem and Linux - Wikipedia

    en.wikipedia.org/wiki/FAT_filesystem_and_Linux

    All of the Linux filesystem drivers support all three FAT types, namely FAT12, FAT16 and FAT32.Where they differ is in the provision of support for long filenames, beyond the 8.3 filename structure of the original FAT filesystem format, and in the provision of Unix file semantics that do not exist as standard in the FAT filesystem format such as file permissions. [1]

  9. Loop device - Wikipedia

    en.wikipedia.org/wiki/Loop_device

    In the user interface it is automatically activated by opening the disk image. MacOS can handle disk (.dmg or .iso), CD-ROM or DVD images in various formats. Loop mounting was not available on Microsoft Windows operating systems until Windows 7, where this functionality is natively implemented, and available through the diskpart utility.