Key Options
Create a disk space usage report by combining various options of the `df` command.
1. Basic Inquiry
2. Filtering and Output
3. Specifying File Systems
Generated command:
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Description:
`df` Executes the command.
Combine the above options to virtually execute commands with AI.
Understanding the Output
The output of the `df` command consists of several columns, each providing important information about the file system's disk usage.
| Column Name | Description |
|---|---|
| Filesystem | Name of the file system (device or network path) |
| Size | Total size of the file system |
| Used | Currently used space |
| Avail | Available space |
| Use% | Percentage of space used |
| Mounted on | The directory where the file system is mounted |
What is an Inode?
An Inode (Index Node) is a data structure in Unix/Linux file systems that stores all information related to a file or directory. File name, owner, permissions, creation/modification time, and the location of data blocks on disk are stored in the Inode. Even if there is remaining disk space, you can no longer create files if all Inodes are exhausted. You can check Inode usage with the `df -i` command.
Usage Examples
Efficiently manage your disk space through practical usage examples of the `df` command.
Check usage of all file systems in a human-readable format
df -hThis is the most commonly used format for quickly grasping the overall disk usage status.
Check usage of a specific mount point
df -h /Checks the disk space usage of the root file system (`/`).
Check only a specific file system type (e.g., ext4)
df -h -t ext4Displays the usage of file systems mounted with the ext4 type only.
Check Inode usage
df -iBy checking the usage and availability of inodes instead of disk blocks, you can diagnose inode exhaustion issues caused by too many small files.
View detailed information of all file systems (in block units)
df -aShows detailed information for all file systems (including virtual file systems) in basic block units.