runuserUID

runuserUID is a command-line utility found on Unix-like operating systems, often used in conjunction with scripts or other programs. Its primary purpose is to execute a command as a specific user ID (UID). This allows a program to run with the privileges and permissions associated with that particular user, without requiring the user to log in directly.

The utility takes a UID as an argument, followed by the command to be executed. For example, `runuserUID 1001 my_command` would execute `my_command` as the user whose UID is 1001. This is particularly useful in scenarios where a system service needs to perform actions on behalf of a non-root user, or when a script needs to ensure a particular command is run with a known set of user-specific permissions.

It is important to note that `runuserUID` typically requires elevated privileges, such as root access, to be executed itself. This is because changing the effective UID of a process is a sensitive operation. The exact behavior and availability of `runuserUID` can vary slightly between different Unix-like systems, though its core functionality remains consistent. It serves as a fundamental tool for process management and privilege delegation within a Unix environment.