The df command¶
The df command in Linux/Unix is used to show the disk usage & information. df is an abbreviation for "disk free".
df displays the amount of disk space available on the file system containing each file name argument. If no file name is given, the space available on all currently mounted file systems is shown.
Syntax¶
df [OPTION]... [FILE]...
Options¶
| Short Flag | Long Flag | Description |
|---|---|---|
-a | --all | Include pseudo, duplicate, inaccessible file systems. |
-B | --block-size=SIZE | Scale sizes by SIZE before printing them; e.g., -BM prints sizes in units of 1,048,576 bytes; see SIZE format below. |
-h | --human-readable | Print sizes in powers of 1024 (e.g., 1023M). |
-H | --si | Print sizes in powers of 1000 (e.g., 1.1G). |
-i | --inodes | List inode information instead of block usage. |
-k | Like --block-size=1K. | |
-l | --local | Limit 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 | --portability | Use the POSIX output format |
--sync | Invoke sync before getting usage info. | |
--total | Elide all entries insignificant to available space, and produce a grand total. | |
-t | --type=TYPE | Limit listing to file systems of type TYPE. |
-T | --print-type | Print file system type. |
-x | --exclude-type=TYPE | Limit listing to file systems not of type TYPE. |
-v | Ignored; included for compatibility reasons. | |
--help | Display help message and exit. | |
--version | Output version information and exit. |
Examples:¶
- 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 the 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