Monitoring System Performance: Lsof Command
The lsof command is used in many Linux/Unix-like systems to display a list of all the open files and the processes. The open files included are disk files, network sockets, pipes, devices, and processes.
One of the main reasons for using this command is when a disk cannot be unmounted and displays the error that files are being used or opened. With this command, you can easily identify which files are in use.
The most common format for lsof command is.