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Full Discussion: Du command and modified date in ssh
Top Forums UNIX for Dummies Questions & Answers Du command and modified date in ssh Post 302929417 by Don Cragun on Sunday 21st of December 2014 03:37:56 AM
Old 12-21-2014
The ls output is showing the size of the files listed (note that a directory is just one type of a file).

The du -hs output is showing the sizes of the blocks allocated to the file and (when the file is a directory) the size of the blocks allocated to the directory added to the sizes of the blocks allocated to all files in the file hierarchy rooted in that directory. Note also that the sizes of files in a file hierarchy reported by du -hs might not be what you expect. If there are hard links to files in a hierarchy, the blocks allocated to each linked file will only be counted once. Therefore, the sum of the sizes reported by:
Code:
du -hs dir1 dir2

might not be the sum of the sizes reported by:
Code:
du -hs dir1;du -hs dir2

And, if there are sparse files, the file size may be huge, but the number of blocks allocated to the file may be tiny.

And note that the size of a directory varies from filesystem type to filesystem type. On some filesystem types, the size of a directory shown by ls will be the size of the directory entries in that directory; in other filesystem types, it will just be the number of directory entries contained in that directory; and in other filesystem types, it might be something else. (On some filesystem types, some directory entries can be stored in the i-node for the directory. This makes the size of the directory zero until enough space is needed by directory entries to overflow the space in the i-node.)
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LEARN ABOUT SUNOS

space

space(4)							   File Formats 							  space(4)

NAME

       space - disk space requirement file

DESCRIPTION

       space is an ASCII file that gives information about disk space requirements for the target environment. The space file defines space needed
       beyond what is used by objects defined in the prototype(4) file; for example, files which will be installed with the installf(1M)  command.
       The space file should define the maximum amount of additional space that a package will require.

       The generic format of a line in this file is:

	      pathname	blocks	inodes

       Definitions for the fields are as follows:

       pathname        Specify a directory name which may or may not be the mount  point for a filesystem.
			Names that do not begin with a slash  ('/') indicate relocatable directories.

       blocks	       Define  the  number  of	disk blocks required for installation of the files and directory entries contained in the pathname
		       (using a 512-byte block size).

       inodes	       Define the number of inodes required for installation of the files and directory entries contained in the pathname.

EXAMPLES

       Example 1: A sample file.

       # extra space required by config data which is
       # dynamically loaded onto the system
       data 500  1

SEE ALSO

       installf(1M), prototype(4)

       Application Packaging Developer's Guide

SunOS 5.10							    7 Feb 1997								  space(4)
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