df
The df utility prints mounted filesystem statistics (disk space/inodes usage).
If used with -h parameter it prints the help message with possible arguments and parameters as follows:
Usage: df [options] [files]
-T: print filesystem type
-i: print inode information instead of block usage
-h: print this help message
The utility prints information about the filesystem on which each file specified in files argument resides. The information displayed consists of:
1. Filesystem - mounted device path
2. Type - filesystem type, optional (see -T option)
3. 1K-blocks/Inodes - total number of 1K blocks/inodes available to the filesystem
4. Used - total number of 1K blocks/inodes used by the filesystem
5. Available - total number of 1K blocks/inodes free for use by the filesystem
6. Capacity - used blocks/inodes percent
7. Mounted on - filesystem mount point
The inodes statistics are available only for ext2 filesystem. Neither dummyfs nor jffs2 collect such global data.
The example of checking root directory on ia32-generic-qemu target architecture:
