How do you determine the type of a file and its i-node in unix?

In Unix, you can determine the type of a file and its i-node by using the ls -l command, which displays detailed information about files, including their types indicated by the first character of the permission string (e.g., - for regular files, d for directories). To find the i-node number, you can use the -i option with ls, such as ls -li, which shows a list of files with their respective i-node numbers. Additionally, the file command can be used to determine the file type more explicitly by examining its content.