Which command provides a list of files that are currently opened on a Linux system?

The command that provides a list of files that are currently opened on a Linux system is "lsof," which stands for "list open files." This powerful utility gives detailed information about all open files and the processes that are using them. It can show various file types, including regular files, directories, network sockets, and devices, along with the user and process ID (PID) associated with each open file.

The other options do not exist as standard Linux commands for listing opened files. "openfiles," "files," and "listopen" are not recognized commands in Unix-like operating systems. Hence, they would not yield any relevant information regarding the files currently being utilized on the system. The usage of "lsof" is essential for system administration, troubleshooting, and monitoring, making it vital to understand its role in Linux environments.