Use the df command to show the amount of free disk space on each mounted disk. The usable disk space reported by df reflects only 90% of full capacity, as the reporting statistics leave a 10% head room above the total available space. This head room normally stays empty for better performance.
The percentage of disk space actually reported by df is used space divided by usable space.
If the file system is above 90% capacity, transfer files to a disk that is not as full by using cp, or to a tape by using tar or cpio; or remove the files.
For a detailed description of this command, refer to the df(1M) man page.
Use the df -k command to display file system information in Kbytes.
$ df -k Filesystem kbytes used avail capacity Mounted on /dev/dsk/c0t3d0s0 192807 19980 153547 12% / |
Table 64-6 describes the df -k command output.
Table 64-6 Output From 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 percent of the total capacity |
mounted on |
Mount point |
The following example shows output of the df -k command.
$ df -k Filesystem kbytes used avail capacity Mounted on /dev/dsk/c0t3d0s0 192807 19980 153547 12% / /dev/dsk/c0t3d0s6 384871 184385 162006 54% /usr /proc 0 0 0 0% /proc fd 0 0 0 0% /dev/fd /dev/dsk/c0t3d0s5 192807 54502 119025 32% /opt swap 184672 200 184472 1% /tmp |