The command `lsof` (list open files) is a standard Unix command that provides a detailed report of all files that are currently open by the system, including the processes that have them open. This information can be useful for troubleshooting file access problems, identifying security risks, and managing system resources.
To use `lsof`, simply type the command followed by the path to the file or directory you want to check. For example, to list all open files in the current directory, you would type: