df

Introduction

The df command is used to check the file system space usage.

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Syntax

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

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Important Flags

Flag	Description
-a or --all	Includes pseudo, duplicate, and inaccessible file systems in the output.
-B or --block-size=	Scales sizes by SIZE before printing them.
-H or --si	Prints sizes in a human-readable format using power of 1000.
-h or --human-readable	Prints sizes in a human-readable format. Print sizes in powers of 1024 (e.g., 1023M)
--help	Display this help and exit.
--inodes	Lists inode information instead of block usage.
-l or --local	Limits listing to local file systems.
--no-sync	Do not invoke sync before getting usage info (default).
--output[=FIELD_LIST]	Use the output format defined by FIELD_LIST, or print all fields if FIELD_LIST is omitted.
-P or --portability	Use the POSIX output format.
-T,--print-type	Prints file system type.
-s, --summarize	Get a summary of the directory's usage in a human-readable format.
--sync	Invoke sync before getting usage info.
--time	Show the time of the last modification to any file in the directory or subdirectory.
-t, --type=TYPE	Limit listing to file systems of type TYPE.
-v	(Ignored).
--version	Output version information and exit.

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Examples

Command	Description
df	Check disk usage on all mounted filesystems.
df .	Display available space on the current file system.
df -h	Check disk usage in a human-readable format.
df -h --total	Show total available disk space.
df -h --total|grep ^total	Show only the total available disk space.
df -h /	Check disk space available on the root mount point.
df -h /boot	Check disk space available on the /boot mount point.
df -h --output=source,avail,pcent,target	Customize the output to show only specific fields.
df -i	Show inode usage on each mounted filesystem.
df -k /test	Display information about /test file system in 1024-byte blocks.
df -m /test	Display information about /test file system in MB blocks.
df -T	Display information about all locally file systems.