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df displays the amount of disk space occupied by currently mounted file systems, the amount of used and available space, and how much of the file system's total capacity has been used. Used without arguments, df reports on all mounted file systems, producing something like:
example% df Filesystem kbytes used avail capacity Mounted on /dev/ip0a 7445 4714 1986 70% / /dev/ip0g 42277 35291 2758 93% /usr
Note: used+avail is less than the amount of space in the file system (kbytes); this is because the system reserves a fraction of the space in the file system to allow its file system allocation routines to work well. The amount reserved is typically about 10%; this may be adjusted using tunefs.8 When all the space on a file system except for this reserve is in use, only the super-user can allocate new files and data blocks to existing files. When a file system is overallocated in this way, df may report that the file system is more than 100% utilized.
If arguments to df are disk partitions (for example, /dev/ip0as or path names, df produces a report on the file system containing the named file. Thus `df .' shows the amount of space on the file system containing the current directory.
The System V version of df works in the same manner as above but prints only the amount of available space (in 512 byte units) and the number of free inodes.
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Created by unroff & hp-tools. © somebody (See intro for details). All Rights Reserved. Last modified 11/5/97