How to check disk space in linux (df)

df (disk free) is a Linux command that displays the amount of free and used disk space on a file system. Here is an explanation table for df command options:

OptionDescription

-h	Human-readable output. Display sizes in a more understandable format, such as "1K", "1M", "1G", etc.
-T	Display file system type in the output.
-t	Limit the results to certain file system types.
-i	Display inode information for the file system.
-a	Display information for all file systems, including those that have a size of zero blocks.

Here are some examples of using the df command in Ubuntu 18:

• Display disk usage information for all mounted file systems in human-readable format:

df -h

 

• Display file system type along with disk usage information:

df -T

 

• Display disk usage information for only ext4 and tmpfs file systems:

df -t ext4,tmpfs

 

• Display inode information for the root file system:

df -i /

• Display disk usage information for all file systems, including those with zero blocks:

df -a