010-the-df-command.md

The df command

The df command in Linux/Unix is used to show the disk usage & information. df is an abbreviation for "disk free".

Usage

Show available disk space

Action: --- Output the available disk space and where the directory is mounted

Details: --- Outputted values are not human-readable (are in bytes)

Command:

df

Show available disk space in human readable form

Action: --- Output the available disk space and where the directory is mounted

Details: --- Outputted values ARE human-readable (are in GBs/MBs)

Command:

df -h

Show available disk space for specific file system

Action: --- Output the available disk space and where the directory is mounted

Details: --- Outputted values are only for the selected file system

Command:

df -hT file_system_name

Show available inodes

Action: --- Output the available inodes for all file systems

Details: --- Outputted values are for inodes and not available space

Command:

df -i

Show file system type

Action: --- Output the file system types

Details: --- Outputted values are for all file systems

Command:

df -T

Exclude file system type from the output

Action: --- Output the information while excluding the chosen file system type

Details: --- Outputted values are for all file systems EXCEPT the chosen file system type

Command:

df -x file_system_type

Syntax:

df [-OPTION] [FILE]

Additional Flags and their Functionalities:

Additional options are OS dependant.

Short Flag	Description
-h	human readable sizes to power of 1024 (base of 2 for sizes)
-H	human readable sizes to power of 1000 (base of 10 for sizes)
-i	show inode information instead of block usage
-l	limit output to local file systems
-l	limit output to local file systems