After a lot of write operations, the changes should be written to the disk.
Please enter the appropriate command, without the path or any options or parameters, that would
achieve this.

Answer: sync

Explanation:
sync writes any data buffered in memory out to disk. This can include (but is not limited to) modified
superblocks, modified inodes, and delayed reads and writes. This must be implemented by the
kernel; The sync program does nothing but exercise the sync(2) system call.