lsof:tldr:1e9ee

The command "lsof -u ${username}" is used to list all the open files and processes that are currently being used by a specific user.

Here's a breakdown of the command:

• "lsof" stands for "list open files." It is a command-line utility in UNIX-like operating systems that enables users to list information about files that are currently opened by active processes.
• "-u" is an option or flag used to specify the user whose open files you want to list.
• "${username}" is a placeholder that should be replaced with the actual username of the user you want to check.

By running this command, you will get a list of all the processes and files currently being used by the specified user. The output will include the process ID (PID), the file descriptor (FD), the type of node, and the file name or path.