Linux Pocket Guide, 2nd Edition

Name

df — stdin  stdout  - file  -- opt  --help  --version

Synopsis

df [options] [disk devices | files | directories]

The df (disk free) program shows you the size, used space, and free space on a given disk partition. If you supply a file or directory, df describes the disk device on which that file or directory resides. With no arguments, df reports on all mounted filesystems.

$ df
Filesystem    1k-blocks     Used Available Use% Mounted on
/dev/sda        1011928   225464    735060  24% /
/dev/sda9        521748   249148    246096  51% /var
/dev/sda8       8064272  4088636   3565984  54% /usr
/dev/sda10      8064272  4586576   3068044  60% /home

Useful options

-k	List sizes in kilobytes (the default).
-m	List sizes in megabytes.
-B N	Display sizes in blocks of N bytes. (Default = 1024)
-h -H	Print human-readable output, and choose the most appropriate unit for each size. For example, if your two disks have 1 gigabyte and 25 kilobytes free, respectively, df -h prints 1G and 25K. The -h option uses powers of 1024, whereas -H uses powers of 1000.
-l	Display only local filesystems, not networked filesystems.
-T	Include the filesystem type (ext3, vfat, etc.) in the output.
-t type	Display only filesystems of the given type.
-x type	Don’t display filesystems of the given type.
-i	Inode mode. Display total, used, and free inodes for each filesystem, instead of disk blocks.