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User identifier. Unix-like operating systems identify a user by a value called a user identifier, often abbreviated to user ID or UID. The UID, along with the group identifier (GID) and other access control criteria, is used to determine which system resources a user can access. The password file maps textual user names to UIDs.
whoami. In computing, whoami is a command found on most Unix-like operating systems, Intel iRMX 86, every Microsoft Windows [1] operating system since Windows Server 2003, and on ReactOS. It is a concatenation of the words "Who am I?"
The Unix command su, which stands for 'substitute user' [1] [2] (or historically 'superuser' [3] [4] ), is used by a computer user to execute commands with the privileges of another user account. When executed it invokes a shell without changing the current working directory or the user environment. When the command is used without specifying ...
Security Identifier. In the context of the Microsoft Windows NT line of operating systems, a Security Identifier ( SID) is a unique, immutable identifier of a user, user group, or other security principal. A security principal has a single SID for life (in a given domain), and all properties of the principal, including its name, are associated ...
Manage your AOL username. Your AOL username is the unique identity that gives you access to services like AOL Mail or premium services. For AOL email addresses, your username is the first part of the email address before the @ symbol. For non-AOL email addresses, your username is the entire email address.
Diameter agents conforming to a certain Diameter extension publicize its support by including a specific value of in the Auth-Application-Id Attribute of the Capabilities-Exchange-Request (CER) and Capabilities-Exchange-Answer (CEA) command. The value of the Application-ID field in the header is the same as any relevant Application-Id AVPs ...
Process identifier. In computing, the process identifier (a.k.a. process ID or PID) is a number used by most operating system kernels —such as those of Unix, macOS and Windows —to uniquely identify an active process. This number may be used as a parameter in various function calls, allowing processes to be manipulated, such as adjusting the ...
List of FTP server return codes. FTP server return codes always have three digits, and each digit has a special meaning. [1] The first digit denotes whether the response is good, bad or incomplete: Range. Purpose. 1xx. Positive Preliminary reply. The requested action is being initiated; expect another reply before proceeding with a new command.