lsof:tldr:e93b3

The command "lsof -i :${port}" is used in Unix-based operating systems to list open internet connections or network sockets listening on a specific port.

Here is a breakdown of the command:

• "lsof" stands for "List Open Files" and is a command used to display information about files and processes that have them open.
• "-i" is an option for lsof, which specifies that we want to list internet (network) files.
• ":${port}" is a parameter that should be replaced with the specific port number you want to check. For example, if you want to see the processes using port 80, you would replace ${port} with 80.

Overall, the command queries the system for any processes that have network sockets open and are listening on a specific port. It provides information about those processes, such as the process ID (PID), user, file descriptor, type of connection (TCP or UDP), and associated program or command.