Disk Space Checking

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Free Disk Space Checking in Linux

df displays the amount of disk space available on the file system containing each file name argument. If no file name is given, the space available on all currently mounted file systems is shown. Disk space is shown in 1K blocks by default, unless the environment variable POSIXLY_CORRECT is set, in which case 512-byte blocks are used.

If an argument is the absolute file name of a disk device node containing a mounted file system, df shows the space available on that file system rather than on the file system containing the device node (which is always the root file system). This version of df cannot show the space available on unmounted file systems, because on most kinds of systems doing so requires very non portable intimate knowledge of file system structures.

Now Open a new terminal window and type in the command df

[dwmoar@workbox ~]$ df

 Filesystem            Size  Used Avail Use% Mounted on
 /dev/sda5              20G  5.4G   14G  29% /
 /dev/sda7             111G   45G   67G  41% /home
 /dev/sdb1             111G   58G   47G  56% /mnt/backups
 /dev/sda6              50G  583M   47G   2% /var

or try this command to show the filesystem type: df-Th

[dwmoar@workbox ~]$ df -Th

 Filesystem    Type    Size  Used Avail Use% Mounted on
 /dev/sda5     ext3     20G  5.4G   14G  29% /
 /dev/sda7     ext3    111G   45G   67G  41% /home
 /dev/sdb1     ext3    111G   58G   47G  56% /mnt/backups
 /dev/sda6     ext3     50G  583M   47G   2% /var

For more information on using the df command use the following: df --help