Reports information about space on file systems. This document describes the AIX® df command as well as the System V version of df.
df [ [ -P ] | [ -I | -M | -i | -t | -v ] ] [ -k ] [ -m ] [ -g ] [ -s ] [FileSystem ... | File... ]
The df command displays information about total space and available space on a file system. The FileSystem parameter specifies the name of the device on which the file system resides, the directory on which the file system is mounted, or the relative path name of a file system. The File parameter specifies a file or a directory that is not a mount point. If the File parameter is specified, the df command displays information for the file system on which the file or directory resides. If you do not specify the FileSystem or File parameter, the df command displays information for all currently mounted file systems. File system statistics are displayed in units of 512-byte blocks by default.
The df command does not fully support NFSv4 filesystems. Use the nfs4cl command to extract block and space information.
Item | Description |
---|---|
-g | Displays statistics in units of GB blocks. The output values for the file system statistics would be in floating point numbers as value of each unit in bytes is significantly high. |
-i | Displays the number of used inodes and the percentage of inodes in use for the file system. This output is the default when the specified file system is mounted. |
-I | Displays information on the total number of blocks, the used space, the free space, the percentage of used space, and the mount point for the file system. |
-k | Displays statistics in units of 1024-byte blocks. |
-m | Displays statistics in units of MB blocks. The output values for the file system statistics would be in floating point numbers as value of each unit in bytes is significantly high. |
-M | Displays the mount point information for the file system in the second column. |
-P | Displays information on the file system in POSIX portable
format. When the -P flag is specified, the header line appears similar to:
If the -k, -m or -g flag is specified in addition to the -P flag, the column heading 512-blocks is replaced by the respective units, depending on which of these flags is used with the -P flag. File system statistics are displayed on one line in the following order: FileSystem, TotalSpace, UsedSpace, FreeSpace, UsedPercentage, MountPoint |
-s | Displays statistics on unmounted JFS or Enhanced JFS file systems by the command line arguments. If there are no arguments specified, the -s flag has no effect. If the file systems specified by the argument are currently mounted or an argument is a file, the -s flag has no effect for that particular argument. To collect statistics on unmounted file systems, an argument must be a JFS or Enhanced JFS file system mount point or device, the file system must be listed in /etc/filesystems, and the user must have read access to the device. |
-t | Includes figures for total allocated space in the output. |
-v | Displays all information for the specified file system. |
This command returns the following exit values:
Item | Description |
---|---|
0 | Successful completion. |
>0 | An error occurred. |
df
If your system has the /, /usr, /site, and /usr/venus file systems mounted,
the output from the df command resembles the following: Filesystem 512-blocks Free %Used Iused %Iused Mounted on
/dev/hd0 19368 9976 48% 4714 5% /
/dev/hd1 24212 4808 80% 5031 19% /usr
/dev/hd2 9744 9352 4% 1900 4% /site
/dev/hd3 3868 3856 0% 986 0% /usr/venus
df -k /test
Filesystem 1024 blocks Free %Used Iused %Iused Mounted on
/dev/lv11 16384 15824 4% 18 1% /tmp/ravi1
This displays the file system statistics in 1024-byte disk blocks.df -m /test
Filesystem MB blocks Free %Used Iused %Iused Mounted on
/dev/lv11 16.00 15.46 4% 18 1% /tmp/ravi1
This displays file system statistics in MB disk blocks rounded off
to nearest 2nd decimal digit.df -g /test
Filesystem GB blocks Free %Used Iused %Iused Mounted on
/dev/lv11 0.02 0.02 0% 18 1% /tmp/ravi1
This displays file system statistics in GB disk blocks rounded
off to nearest 2nd decimal digit.cd/
df .
The output from this command resembles the following:
Device 512-blocks free %used iused %iused Mounted on
/dev/hd4 19368 9976 48% 4714 5% /
Item | Description |
---|---|
/etc/filesystems | Lists the known file systems and defines their characteristics. |
/etc/vfs | Contains descriptions of virtual file system types. |
Reports number of free disk blocks and files.
/usr/sysv/bin/df [ -a ] [ -l ] [ [ [ -e ] [-g ] [ -n ] ] | [ [ -i ] [ -v ] ] | -t ] ] [FileSystem ...] [File ...]
The df command displays information about total space and available space on a file system. File system statistics are displayed in units of 512-byte blocks
Item | Description |
---|---|
-a | Performs the default operation and prints the mount point, the device name, number of free blocks and number of used inodes (files). |
-e | Print only the number of free files. |
-g | Print the entire statvfs structure. This option overrides the -a , -e, -i, -n, -t and -v options. The numbers for available, total, and free blocks are reported in 512 byte blocks. |
-i | Displays the total number of inodes, the number of free inodes, the number of used inodes, and the percentage of inodes in use. |
-l | Reports on local file systems only. |
-n | Prints the type of filesystem. |
-t | Causes total allocated block figures to be reported. |
-v | Reports percent of blocks used as well as the number of blocks used and free. |
Item | Description |
---|---|
File | The File parameter specifies a file or a directory that is not a mount point. If the File parameter is specified, the df command displays information for the file system on which the file or directory resides. |
FileSystem | The FileSystem parameter specifies the name of the device on which the file system resides, the directory on which the file system is mounted, or the relative path name of a file system. |
/usr/sysv/bin/df
The output looks similar to the following: / (/dev/hd4 ): 19656 blocks 1504 files
/usr (/dev/hd2 ): 1139904 blocks 20254 files
/var (/dev/hd9var ): 23096 blocks 512 files
/tmp (/dev/hd3 ): 2464 blocks 204 files
/home (/dev/hd1 ): 44208 blocks 146 files
/proc (/proc ): 0 blocks 0 files
/opt (/dev/hd10opt ): 13880 blocks 310 files
/usr/sysv/bin/df .
/usr/sysv/bin/df -i
The output looks similar to the following: Mount Dir Filesystem iused avail itotal %iused
/ /dev/hd4 1504 6688 8192 19%
/usr /dev/hd2 20254 127202 147456 14%
/var /dev/hd9var 512 3584 4096 13%
/tmp /dev/hd3 204 5940 6144 4%
/home /dev/hd1 146 14190 14336 2%
/proc /proc 0 0 0 0
/opt /dev/hd10opt 310 5834 6144 6%
/usr/sysv/bin/df -v /tmp
/usr/sysv/bin/df -n
/usr/sysv/bin/df -i -l
/usr/sysv/bin/df -g
/usr/sysv/bin/df -e
Item | Description |
---|---|
/usr/sysv/bin/df | Contains the System V df command. |
/etc/filesystems | Contains filesystem information. |