Red Hat ENTERPRISE LINUX 5 - DEPLOYMENT Deployment Manual page 556

Chapter 38. Gathering System Information
Filesystem
/dev/mapper/VolGroup00-LogVol00
100691
none
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 -h argument stands for human-readable format. The output looks similar to the
following:
Filesystem
/dev/mapper/VolGroup00-LogVol00
99M 9.1M 85M 10% /boot
none 316M 0 316M
In the list of mounted partitions, there is an entry for /dev/shm. This entry represents the system's
virtual memory file system.
The du command displays the estimated amount of space being used by files in a directory. If you
type du at 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 -hs to see only the grand total
for the directory in human-readable format. Use the du --help command 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-
monitor at 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.
530
1K-blocks Used Available Use% Mounted on
11675568 6272120
9281 86211
322856 0
Size Used Avail Use% Mounted on
12G 6.0G 4.6G 57% / /dev/sda1
0% /dev/shm
4810348 57% / /dev/sda1
10% /boot
322856 0% /dev/shm