Assoc cmd command

Assoc is command (internal) found inside Windows Command Processor Command Prompt, that allows for file extension to file type association. A file extension is generally last few characters in File Name after period (“.”). Though it is not mandatory for file to have an extension at all (in case of extension-less files).

Extension to file type association is enforced predominantly by Windows OS. Other Operating Systems such as Linux and macOS does support such association but don’t enforce them to levels of Windows. Linux Kernel rather utilizes Magic Numbers for recognition of file types. In this article, we will take look at assoc command found in cmd, and would look at uses of it.

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Access matrix in Operating System

Access Matrix is a security model of protection state in computer system. It is represented as a matrix. Access matrix is used to define the rights of each process executing in the domain with respect to each object. The rows of matrix represent domains and columns represent objects. Each cell of matrix represents set of access rights which are given to the processes of domain means each entry(i, j) defines the set of operations that a process executing in domain Di can invoke on object Oj.

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Move cmd command

The move is an internal command found in the Windows Command Interpreter (cmd) that is used to move files and folders/directories. The command is robust than a regular move operation, as it allows for pattern matching via the inclusion of Wildcards in the source path.

The command is a very generic one and is available (in one form or the other) in almost every single operating system out there (under different aliases).

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