df Cheatsheet
Basic Usage
Common ways to check disk space.
| Command | Description |
|---|---|
df
|
Show disk usage for all mounted filesystems |
df /path |
Show filesystem usage for the given path |
df -h |
Human-readable sizes (K, M, G — powers of 1024) |
df -H |
Human-readable sizes (K, M, G — powers of 1000) |
df -a |
Include all filesystems (including pseudo and duplicate) |
df --total |
Add a grand total row at the bottom |
Size Formats
Control how sizes are displayed.
| Option | Description |
|---|---|
-h |
Auto-scale using powers of 1024 (K, M, G) |
-H |
Auto-scale using powers of 1000 (SI units) |
-k |
Display sizes in 1K blocks (default on most systems) |
-m |
Display sizes in 1M blocks |
-BG |
Display sizes in 1G blocks |
-B SIZE |
Use SIZE-byte blocks (e.g., -BM, -BG, -B512) |
Output Columns
What each column in the default output means.
| Column | Description |
|---|---|
Filesystem |
Device or remote path of the filesystem |
1K-blocks / Size |
Total size of the filesystem |
Used |
Space currently in use |
Available |
Space available for use |
Use% |
Percentage of space used |
Mounted on |
Directory where the filesystem is mounted |
Filesystem Type
Show or filter by filesystem type.
| Option | Description |
|---|---|
-T |
Show filesystem type column |
-t TYPE |
Only show filesystems of the given type |
-x TYPE |
Exclude filesystems of the given type |
-l |
Show only local filesystems (exclude network mounts) |
Examples:
| Command | Description |
|---|---|
df -t ext4 |
Show only ext4 filesystems |
df -x tmpfs |
Exclude tmpfs from output |
df -Th |
Show type column with human-readable sizes |
Inode Usage
Show inode counts instead of block usage.
| Command | Description |
|---|---|
df -i |
Show inode usage for all filesystems |
df -ih |
Show inode usage with human-readable counts |
df -i /path |
Show inode usage for a specific filesystem |
| Column | Description |
|---|---|
Inodes |
Total number of inodes |
IUsed |
Inodes in use |
IFree |
Inodes available |
IUse% |
Percentage of inodes used |
Custom Output Fields
Select specific fields with --output.
| Field | Description |
|---|---|
source |
Filesystem device |
fstype |
Filesystem type |
size |
Total size |
used |
Space used |
avail |
Space available |
pcent |
Percentage used |
iused |
Inodes used |
iavail |
Inodes available |
ipcent |
Inode percentage used |
target |
Mount point |
Example: df --output=source,size,used,avail,pcent,target -h
Related Guides
Use these references for deeper disk usage workflows.
| Guide | Description |
|---|---|
How to Check Disk Space in Linux Using the df Command
|
Full df guide with practical examples |
Du Command in Linux
|
Check disk usage for directories and files |
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