Use disk status

df :This command is used to display disk space in bytes.

a)df :To display disk space in bytes.
                                  Syntax:$df
Ex :$df

b)df -h :To display disk space in kilo bytes.
                                Syntax:$df -h
Ex :$df -h

c)du :To display directory wise disk usage from of blocks and every block size 1024 bytes.
                              Syntax:$du
Ex :du