Which command can provide information about the status of a mounted filesystem in Linux?

The command that provides information about the status of a mounted filesystem in Linux is 'df'. This command, which stands for "disk free," is specifically designed to display information regarding the available and used disk space on the filesystem. When executed, 'df' will provide details such as the total size of the filesystem, used space, available space, and the mount point for each mounted filesystem, making it a valuable tool for monitoring filesystem usage.

The other commands are useful for different purposes. For instance, 'ls' is intended for listing files and directories in a specified directory, functioning primarily as a directory content viewer rather than providing filesystem metrics. The 'stat' command can be used to display detailed information about files or file systems, but it focuses on individual files rather than providing an overview of the entire mounted filesystem. Meanwhile, 'fdisk' is meant for managing disk partitions and does not provide a summary of filesystem usage or mount status. Thus, 'df' is the most relevant and specific choice for obtaining information on mounted filesystems.