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

CORRECT TEXT
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