What command is used to display information about a mounted filesystem including block sizes and UUID info?

The command that is used to display information about a mounted filesystem, including block sizes and UUID info, is typically xfs_info when dealing with XFS filesystems. This command provides detailed information specific to XFS filesystems, such as block size, extent size, and allocation group information, making it valuable for system administrators who need precise details about their XFS mounts.

In contrast, df is primarily used to report the disk space usage of filesystems but does not provide the detailed information about block sizes and UUID that xfs_info does. The mount command lists all currently mounted filesystems but does not go into the specifics like block sizes. Lastly, fsck is a filesystem check command that is used for checking and repairing filesystem inconsistencies, not for listing filesystem information. Thus, the specificity of xfs_info in delivering important details makes it the correct choice for understanding the attributes of a mounted XFS filesystem.