Displaying Disk Space Statistics (df)
Use the df command to show the amount of free disk space on
each mounted disk. The usable disk space that is reported by df
reflects only 90 percent of full capacity, as the reporting statistics allows for
10 percent above the total available space. This head room normally stays empty for better
performance.
The percentage of disk space actually reported by the df command is used
space divided by usable space.
If the file system exceeds 90 percent capacity, you could transfer files to
a disk that is not as full by using the cp command. Alternately,
you could transfer files to a tape by using the tar or
cpio commands. Or, you could remove the files.
For a detailed description of this command, see the df(1M) man page.
How to Display Disk Space Information (df -k)
Example 13-4 Displaying File System Information
The following example shows the output from the df -k command.
$ df -k
Filesystem kbytes used avail capacity Mounted on
/dev/dsk/c0t0d0s0 254966 204319 25151 90% /
/devices 0 0 0 0% /devices
ctfs 0 0 0 0% /system/contract
proc 0 0 0 0% /proc
mnttab 0 0 0 0% /etc/mnttab
swap 496808 376 496432 1% /etc/svc/volatile
objfs 0 0 0 0% /system/object
/dev/dsk/c0t0d0s6 3325302 3073415 218634 94% /usr
fd 0 0 0 0% /dev/fd
swap 496472 40 496432 1% /var/run
swap 496472 40 496432 1% /tmp
/dev/dsk/c0t0d0s5 13702 1745 10587 15% /opt
/dev/dsk/c0t0d0s7 9450 1045 7460 13% /export/home
The following table describes the output of the df -k command.
Field Name |
Description |
|---|
kbytes |
Total size of
usable space in the file system |
used |
Amount of space used |
avail |
Amount of space available
for use |
capacity |
Amount of space used, as a percentage of the total capacity |
mounted on
|
Mount point |
