The df command displays information about total space and available space on a file system. The FileSystem parameter specifies the name of the device on which the file system resides, the directory on which the file system is mounted, or the relative path name of a file system. Try it as follows:
df
df -k $HOME
df -k /tmp
df -m /path/to/dir
Linux how to determine the file system type
UNIX Disk Usage Command Examples
Linux / Unix: Checking Free Disk Space
How do I find out more information about ext3 or ext2 file system?
Linux: Find Out What Partition a File Belongs To
OpenBSD: Mount An ISO Image CommandHowto find out information about Unix System
How To: Unmount an ISO Image in LinuxHow do I find file fragmentation for specific file under Linux?
How do I find out more information about block devices?
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