Linux df Command- Free Disk space available, Print Files Format, cmd Example

Topic

What is Linux df Command?

Explanation

df COMMAND:
     df command is used to report how much free disk space is available for each mount you have. The first column show the name of the disk partition as it appears in the /dev directory. Subsequent columns show total space, blocks allocated and blocks available.

SYNTAX:
  The Syntax is
     df [options]

OPTIONS:

-a	Include dummy file systems.
-h	Print sizes in human readable format.(e.g., 1K 234M 2G)
-H	Print sizes in human readable format but use powers of 1000 not 1024.
-i	List inode information instead of block usage.
-l	Limit listing to local file systems.
-P	Use the POSIX output format.
-T	Print file system type.

EXAMPLE:

df

Output:

Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
                     150263916  14440324 128067408  11% /
/dev/sda1               101086     10896     84971  12% /boot
tmpfs                   253336         0    253336   0% /dev/shm

In the above output:
 /dev/mapper/VolGroup00-LogVol00 -> Specifies FileSystem.
 /dev/sda1                       -> Specifies FileSystem.
 tmpfs                           -> Specifies FileSystem.

Prints default format.

df -h

Output:

Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
                      144G   14G  123G  11% /
/dev/sda1              99M   11M   83M  12% /boot
tmpfs                 248M     0  248M   0% /dev/shm

Print size in human readable format.

df -H

Output:

Filesystem             Size   Used  Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
                       154G    15G   132G  11% /
/dev/sda1              104M    12M    88M  12% /boot
tmpfs                  260M      0   260M   0% /dev/shm

Print size in human readable format but use powers of 1000 not to 1024.

df Linux Commands