The df command displays information about total space and available space on a file system. You can specify the name of a device on which the file system is located, the directory on which the file system is mounted, or the relative path name of the file system. You can also specify a file or directory that is not a mount point, and the df command displays information for the file system on which the file or directory is located. If you just specify the command with no parameters, it displays information for all currently mounted file systems. File system statistics are displayed in units of 1024-byte blocks by default. The command can also display inodes usage instead of block usage. The output in human readable format (e.g., 1K 234M 2G) is available using -h flag.
To display information about all mounted file systems, enter:
The output from the df command can resembles this:
Filesystem 1K-blocks Used Available Use% Mounted on /dev/sda3 20642428 8246984 11346868 43% / tmpfs 1927132 9608 1917524 1% /dev/shm /dev/sda2 495844 88293 381951 19% /boot /dev/sda7 445674536 111535892 311499644 27% /home /dev/mapper/tmp-sda6 4128448 139488 3779248 4% /tmp 192.168.1.1:/ipm4r4-psfnc 51606272 17550080 31434752 36% /ipm4r4-psfnc 192.168.1.1:/ipm4r4 51606272 17550080 31434752 36% /ipm4r4