39.3. File Systems
dfcommand reports the system's disk space usage. If you type the command
dfat a shell prompt, the output looks similar to the following:
Filesystem 1K-blocks Used Available Use% Mounted on /dev/mapper/VolGroup00-LogVol00 11675568 6272120 4810348 57% / /dev/sda1 100691 9281 86211 10% /boot none 322856 0 322856 0% /dev/shm
By default, this utility shows the partition size in 1 kilobyte blocks and the amount of used and available disk space in kilobytes. To view the information in megabytes and gigabytes, use the command
df -h. The
-hargument stands for human-readable format. The output looks similar to the following:
Filesystem Size Used Avail Use% Mounted on /dev/mapper/VolGroup00-LogVol00 12G 6.0G 4.6G 57% / /dev/sda1 99M 9.1M 85M 10% /boot none 316M 0 316M 0% /dev/shm
In the list of mounted partitions, there is an entry for
/dev/shm. This entry represents the system's virtual memory file system.
ducommand displays the estimated amount of space being used by files in a directory. If you type
duat a shell prompt, the disk usage for each of the subdirectories is displayed in a list. The grand total for the current directory and subdirectories are also shown as the last line in the list. If you do not want to see the totals for all the subdirectories, use the command
du -hsto see only the grand total for the directory in human-readable format. Use the
du --helpcommand to see more options.
To view the system's partitions and disk space usage in a graphical format, use the Gnome System Monitor by clicking on System => Administration => System Monitor or type
gnome-system-monitorat a shell prompt (such as an XTerm). Select the File Systems tab to view the system's partitions. The figure below illustrates the File Systems tab.
Figure 39.3. GNOME System Monitor - File Systems