Prints disk usage (as the number of 512-byte blocks used by each named directory and its subdirectories; default is current directory).
Print usage for all files, not just subdirectories.
In addition to normal output, print grand total of all arguments.
Summarize usage for each directory at most
depth directories down.
Follow symbolic links, but only if they are command-line arguments.
Human-readable output, with units spelled out: bytes, kilobytes, etc.
Ignore entries matching
Print sizes in kilobytes.
Follow symbolic links.
Don't follow any symbolic links.
Print a total for each file specified.
Display usage of files in current filesystem only.