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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.
In Microsoft Windows, cacls, and its replacement icacls, are native command-line utilities that can display and modify the security descriptors on files and folders. [1] [2] An access-control list is a list of permissions for securable object, such as a file or folder, that controls who can access it.
The user-profiling scheme in force today owes its origins to Windows NT, which stored its profiles within the system folder itself, typically under C:\WINNT\Profiles\. Windows 2000 saw the change to a separate "Documents and Settings" folder for profiles, and in this respect is virtually identical to Windows XP and Windows Server 2003.
It is no longer possible to safely relocate the profiles directory (C:\Users) to another partition without using unsupported methods. Microsoft recommends against moving the user profile folder. In Windows XP, the WinNT.sif file allowed relocating "Documents and Settings" to another partition than C: before Windows installation completed.
Fast user switching allows additional users to log into a Windows XP machine without existing users having to close their programs and log out. Although only one user at the time can use the console (i.e., monitor, keyboard, and mouse), previous users can resume their session once they regain control of the console. [ 20 ]
File system permissions: ACLs: Transparent compression: Per-file, LZ77 (Windows NT 3.51 onward) Transparent encryption: Per-file, DESX (Windows 2000 onward), Triple DES (Windows XP onward), AES (Windows XP Service Pack 1, Windows Server 2003 onward) Data deduplication: Yes (Windows Server 2012) [9] Other; Supported operating systems: Windows NT ...
Windows XP implements "simple file sharing" (also known as "ForceGuest"), a feature that can be enabled on computers that are not part of a Windows domain. [6] When enabled, it authenticates all incoming access requests to network shares as "Guest", a user account with very limited access rights in Windows. This effectively disables access to ...
In Unix and Unix-like systems, including POSIX-conforming systems, each file has a 'mode' containing 9 bit flags controlling read, write and execute permission for each of the file's owner, group and all other users (see File-system permissions §Traditional Unix permissions for more details) plus the setuid and setgid bit flags and a 'sticky' bit flag.