TestOut Linux Pro Practice Test

Which command can be used to verify all permissions in the /hr directory?

1. ls -l /hr

2. ls -a /hr

3. ls /hr

4. ls -r /hr

The correct answer is: ls -l /hr

The command that effectively verifies all permissions in the /hr directory is "ls -l /hr". This command provides a detailed list of files and subdirectories within the specified directory, displaying their permissions, ownership, size, and modification date in a long format. When you execute "ls -l", it breaks down the permissions for the user, group, and others for each entry in the directory. The output begins with a character that indicates the type of file (such as a directory or a regular file), followed by a string of ten characters that show the permission settings: read, write, and execute for the owner, group, and others respectively. This detailed output is essential for understanding access control in the Linux filesystem. The other options serve different purposes. "ls -a /hr" lists all files, including hidden files that begin with a dot, but does not provide detailed permission information. "ls /hr" shows a simple list of the files and directories without any additional details, and "ls -r /hr" lists the contents of the directory in reverse order, also without permission details. Hence, only "ls -l /hr" provides the full view of permissions that is needed to verify access settings.