du [OPTION]... [FILE]...

• For each file specified, the du command displays the disk space usage.
  
  
• For each directory specified, the du command displays the disk space usage for the directory and all its contents recursively.
  
  
• If no file or directory is specified, the du command displays the disk space usage for the current directory and all its contents.
  

• Display the disk usage for all files and directories in human-readable format:

  $ du -ah folder1/
  4.0K    folder1/file1
  4.0K    folder1/file2
  4.0K    folder1/file3
  0    folder1/folder2
  0    folder1/folder2/folder3
  16K    folder1/
  

• Display the disk usage for all items within a directory (but not the directory itself):

  $ du -h folder1/*
  4.0K    folder1/file1
  4.0K    folder1/file2
  4.0K    folder1/file3
  0    folder1/folder2
  

• Display the disk usage for directories only (default behavior):

  $ du -h folder1/
  0    folder1/folder2/folder3
  0    folder1/folder2
  16K    folder1/
  

• Display the disk usage for directories up to a specific depth:

  $ du -hd 1 folder1/
  0    folder1/folder2
  16K    folder1/
  

• Display only the total disk usage of a directory:

  $ du -sh folder1/
  16K    folder1/
  

• Display disk usage with a grand total:

  $ du -shc folder1/ folder2/
  16K    folder1/
  8.0K   folder2/
  24K    total
  

-a, --all
    Display sizes for all files, not just directories.

-d, --max-depth=N
    Print the total for a directory only if it is N or fewer levels below the command line argument.

-s, --summarize
    Display only a total for each argument (equivalent to --max-depth=0).

-c, --total
    Produce a grand total at the end.

-h, --human-readable
    Print sizes in human readable format (e.g., 1K 234M 2G).

-k, --block-size=1K
    Use 1024-byte blocks instead of the default block size.

-m, --block-size=1M
    Use 1048576-byte (1-Mbyte) blocks.

-B, --block-size=SIZE
    Scale sizes by SIZE before printing them.

-L, --dereference
    Dereference all symbolic links.

-x, --one-file-system
    Skip directories on different file systems.

--exclude=PATTERN
    Exclude files that match PATTERN.

--time
    Show time of the last modification of any file in the directory.

--apparent-size
    Print apparent sizes, rather than disk usage.