File Systems


The df command reports the system's disk space usage. If you type the command df at a shell prompt, the output looks similar to the following:

Filesystem              1k-blocks      Used Available Use% Mounted on /dev/hda2                10325716   2902060   6899140  30% / /dev/hda1                   15554      8656      6095  59% /boot /dev/hda3                20722644   2664256  17005732  14% /home none                       256796         0    256796   0% /dev/shm

By default, df 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 -h option with the df command. The -h option stands for human-readable format. The output for the df -h command looks similar to the following:

Filesystem             Size  Used Avail Use% Mounted on /dev/hda2              9.8G  2.8G  6.5G  30% / /dev/hda1               15M  8.5M  5.9M  59% /boot /dev/hda3               20G  2.6G   16G  14% /home none                   251M     0  250M   0% /dev/shm

In the list of partitions (the Mounted on column), you can see 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 will be displayed in a list. The grand total for the current directory and subdirectories will also be 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 System Monitor tab (as shown at the bottom of Figure 25-2).




The Red Hat Documentation Team - Official Red Hat Linux User's Guide
The Red Hat Documentation Team - Official Red Hat Linux User's Guide
ISBN: N/A
EAN: N/A
Year: 2002
Pages: 223

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