Determining current storage using operating system commands
Use one of the following options, depending on your operating system, to determine the current storage used:
Use df to determine the amount of free space available on most UNIX systems. There are switches (-k to give the result in kilobytes and –s to give summary information) that will make the information easier to read.
Use bdf on HPUX to report the same information as described in the previous bullet.
Use the disk properties option in Windows to provide a graphical display of disk storage information.