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UNIX in a Nutshell: System V Edition

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UNIX Commands
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df [options] [name]

Report the number of free disk blocks and inodes available on all mounted file systems or on the given name. (Unmounted file systems are checked with -F.) name can be a device name (e.g., /dev/dsk/0s9), the directory name of a mounting point (e.g., /usr), a directory name, or a remote resource name (e.g., an RFS/NFS resource). Besides the options listed, there are additional options specific to different file system types or df modules.



Print only the number of free kilobytes.


Print only the number of free files.


Report free blocks but not free inodes (SVR3 only).

-F type

Report on an unmounted file system specified by type. Available types can be seen in the file /etc/vfstab.


Print the whole statvfs structure (overriding other print options).


Print allocation in kilobytes (typically used without other options).


Report only on local file systems.


Print only the file system type name; with no other arguments, -n lists the types for all mounted file systems.

-o suboptions

Supply a comma-separated list of type-specific suboptions.


Report total allocated space as well as free space.


Echo command line but do not execute command.

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