DF(1)DF(1)NAMEdf - report free disk space on file systems
SYNOPSISdf [ -i ] [ filesystem ... ] [ file ... ] [ -t type ] [ filesystem ...
] [ filename ... ]
DESCRIPTIONdf 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:
tutorial% df
Filesystem kbytes used avail capacity Mounted on
/dev/ip0a 7445 4714 1986 70% /
/dev/ip0g 42277 35291 2758 93% /usr
Note that 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. 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/ip0a) or UNIX
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.
OPTIONS-i Also report the number of inodes which are used and free. This
option is only meaningful for local file systems, since the NFS
protocol does not support it.
-t type
Report on filesystems of a given type (for example, nfs or 4.2).
FILES
/etc/mtab list of currently mounted filesystems
SEE ALSOdu(1V), mtab(5), quot(8), tunefs(8)4th Berkeley Distribution April 29, 1985 DF(1)