df is a Linux command for for reporting file system disk usage on a Linux system. While brewing coffee at home I found the following.

How to view disk usage using df command? Simple!

Simplest way is just to type df on the command line and you should get the below output:

 Filesystem     1K-blocks    Used Available Use% Mounted on
 overlay         61252420 9817828  48293424  17% /
 tmpfs              65536       0     65536   0% /dev
 tmpfs            1023564       0   1023564   0% /sys/fs/cgroup
 shm                65536       0     65536   0% /dev/shm
 /dev/sda1       61252420 9817828  48293424  17% /etc/hosts
 tmpfs            1023564       0   1023564   0% /proc/acpi
 tmpfs            1023564       0   1023564   0% /sys/firmware 

Columns explanation:

  • Filesystem – the filesystem on the machine
  • 1K-blocks – the size of the filesystem in 1K blocks
  • Used – the amount of space used in 1K blocks
  • Available – the amount of available space in 1K blocks
  • Use% – the percentage that the filesystem is in use.
  • Mounted on – where the filesystem is mounted.

Using the Linux df command ff you like to view the output in human readable use df -H

To show the filesystem type use df -T

To show only specific file system types use df -t ext4 as an example.

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