du [file | directory ...]

• For each file specified, the du command displays the file system block usage.
  
  
• For each directory specified, the du command displays the file system block usage for all its sub-directories.
  
  
• If none is specified, the du command displays the file system block usage for all sub-directories of the current directory.
  

• Display the file system block usage for all files and directories: $ du -ah folder1/ 12K folder1/ 4.0K folder1//file1 4.0K folder1//file2 4.0K folder1//file3 0B folder1//folder2 0B folder1//folder2/folder3
  
• Display the file system block usage for all files and directories, excluding the specified directory from the list: $ du -h folder1/* 4.0K folder1//file1 4.0K folder1//file2 4.0K folder1//file3 0B folder1//folder2 0B folder1//folder2/folder3
  
• Display the file system block usage for all sub-directories of a directory: $ du -h folder1/ 12K folder1/ 0B folder1//folder2 0B folder1//folder2/folder3
  
• Display the file system block usage for sub-directories of a directory "n" directories deep: $ du -hd 1 folder1/ 12K folder1/ 0B folder1//folder2
  

The following options can be used:
-a |For each directory specified, displays the file system block usage for the specified directory and all its files and sub-directories. -d <depth> |For each directory specified, displays the file system block usage for all its sub-directories <depth> directories deep. -s |Display the file system block usage for each specified file or directory. |Equivalent to "-d 0" -c |Display the total of file system block usage of all listed files. -h |"Human-readable" output. |Use unit suffixes: Byte (-b), Kilobyte (-k), Megabyte (-m), Gigabyte (-g). -k |Display block counts in 1024-byte (1-Kbyte) blocks. -m |Display block counts in 1048576-byte (1-Mbyte) blocks. -g |Display block counts in 1073741824-byte (1-Gbyte) blocks.