Final answer:
The command that can be used to display a list of open files is lsof.
Step-by-step explanation:
The command that can be used to display a list of open files is lsof.
This command stands for "list open files" and it is used in Unix-based systems to provide detailed information about files that processes have open. It displays the names of open files, the processes that have them open, and other information such as file size and file access mode.