NAME
       df - report file system disk space usage

SYNOPSIS
       df [OPTION]... [FILE]...

See man df.

Shows storage on disk by mount point (partions, hard drives, external media) and shows a percent usage. This can give a wider picture than du command.

See answer on Unix Stack Exchange site.

Flags

  • -h, --human-readable - Print sizes in powers of 1024 (e.g., 1023M)
  • -H, --si - Print sizes in powers of 1000 (e.g., 1.1G)

Total

Total for all local mounts:

$ df --total -hl

$ df -hl --total PATH_A PATH_B

All

If the mount for / path is close to 100% then you’ll errors running your machine.

This does not need root privileges.

$ df -h
Filesystem                Size  Used Avail Use% Mounted on
udev                      3.9G     0  3.9G   0% /dev
tmpfs                     790M   26M  764M   4% /run
/dev/sda7                  19G   17G  1.1G  94% /
tmpfs                     3.9G   73M  3.8G   2% /dev/shm
...

Path

$ df -h ~

$ df -h / ~
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda7              19G   17G  1.1G  94% /
/dev/mapper/vg0-home   98G   41G   53G  44% /home

Types

Add -T to show type.

e.g. ext4, tmpfs, vfat.

If you want to list all mounts except the ‘special’ ones, you can use the -x option to exclude by partition type.

alias my-df='df -h -x devtmpfs -x tmpfs -x debugfs'