files:permission

The command "ls -l ${filename}" is used to list detailed information about a specific file.

Here's a breakdown of each component:

• "ls" stands for "list" and is a command used in Unix-like operating systems to display the files and directories within a specific directory.

• "-l" is an option that tells the "ls" command to display the information in a long format. This includes details such as file permissions, ownership, size, and modification date.

• "${filename}" is a placeholder for the actual name of the file you want to list. It can be replaced with the specific name of the file you want to retrieve information for.

By running this command, the system will display the detailed information of the specified file, including permissions, ownership, size, and modification date in a long format.