Which command can be used to change the file-system parameters to make all of the partition available to users, WITHOUT losing data?

The administrator notices that a 10GB ext2 file-system used only for data storage has approximately
540MB reserved for root. Which command can be used to change the file-system parameters to
make all of the partition available to users, WITHOUT losing data? Please enter only the command
without path, options or parameters.

Answer: tune2fs