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  2. File-system permissions - Wikipedia

    en.wikipedia.org/wiki/File-system_permissions

    Distinct permissions apply to the owner. Files and directories are assigned a group, which define the file's group class. Distinct permissions apply to members of the file's group. The owner may be a member of the file's group. Users who are not the owner, nor a member of the group, comprise a file's others class. Distinct permissions apply to ...

  3. chmod - Wikipedia

    en.wikipedia.org/wiki/Chmod

    File-system permissions; chattr, the command used to change the attributes of a file or directory on Linux systems; chown, the command used to change the owner of a file or directory on Unix-like systems; chgrp, the command used to change the group of a file or directory on Unix-like systems

  4. errno.h - Wikipedia

    en.wikipedia.org/wiki/Errno.h

    Cannot allocate memory EACCES: 13: Permission denied EFAULT: 14: Bad address ENOTBLK: 15: Block device required EBUSY: 16: Device or resource busy EEXIST: 17: File exists EXDEV: 18: Invalid cross-device link ENODEV: 19: No such device ENOTDIR: 20: Not a directory EISDIR: 21: Is a directory EINVAL: 22: Invalid argument ENFILE: 23: Too many open ...

  5. Directory structure - Wikipedia

    en.wikipedia.org/wiki/Directory_structure

    Programs do not have permission to store files in this folder, but have permission to create subfolders and store files in them. The organization of the files is at the discretion of the developer. \Users. User profile folders. This folder contains one subfolder for each user that has logged onto the system at least once.

  6. Blacklist (computing) - Wikipedia

    en.wikipedia.org/wiki/Blacklist_(computing)

    Screenshot of a website blocking the creation of content which matches a regular expression term on its blacklist. In computing, a blacklist, disallowlist, blocklist, or denylist is a basic access control mechanism that allows through all elements (email addresses, users, passwords, URLs, IP addresses, domain names, file hashes, etc.), except those explicitly mentioned.

  7. stat (system call) - Wikipedia

    en.wikipedia.org/wiki/Stat_(system_call)

    stat command line. stat() is a Unix system call that returns file attributes about an inode.The semantics of stat() vary between operating systems.As an example, Unix command ls uses this system call to retrieve information on files that includes:

  8. Protected mode - Wikipedia

    en.wikipedia.org/wiki/Protected_mode

    In computing, protected mode, also called protected virtual address mode, [1] is an operational mode of x86-compatible central processing units (CPUs). It allows system software to use features such as segmentation, virtual memory, paging and safe multi-tasking designed to increase an operating system's control over application software.

  9. User Account Control - Wikipedia

    en.wikipedia.org/wiki/User_Account_Control

    Changes to files in folders that standard users don't have permissions for (such as %SystemRoot% or %ProgramFiles% in most cases) Changes to an access control list (ACL), commonly referred to as file or folder permissions; Installing and uninstalling applications outside of: The %USERPROFILE% (e.g. C:\Users\{logged in user}) folder and its sub ...