System and processes
The df command
Shows the free and used space of mounted disks.
Syntax
df [-h]Most useful options
-hHuman-readable sizes (K, M, G)-TIncludes the filesystem typeCopy-ready examples
$ df -hSpace per disk$ df -h /Only the rootYou can try them in the browser terminal: it does not touch your computer.
Typical mistakes
- If a disk fills to 100%, the system starts failing in strange ways.
FAQ
df or du?
df looks at the whole disk; du measures a specific folder.
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