Linux – Total disk space used for one directory including it’s sub-directories

bashfilesystemslinux

On a Linux environment. How can I find out the total space a folder is taking. It would like this total to include ALL sub-directories in the total. I don't want a dump of the size of each subdirectory. Just the total size a directory is taking up with the size of all it's subdirectories included in the c

Best Answer

du -sh /path/to/directory

The output will return sumarize and human readeable directory size.

or in MB

du --max-depth=0 --one-file-system -m /path/to/directory

Also, you can create an alias if you will going to execute this command often.
If you want to know more about du command, execute: man du

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Linux – filesystem for millions of small files

In terms of random seeks Reiser wins, followed by EXT4, followed by JFS. I'm not sure if this will correlate exactly to directory lookups, but it seems like it would be an indicator. You'll have to do your own tests for that specifically. EXT2 beats the pants off everything for file creation times, likely due to its lack of a journal, still EXT4 beats everything except Reiser which you may not want to use due to hans reiser's current status.

You might want to look into drives that support NCQ, and make sure your install is setup to use it. Under heavy seeking it should provide a speed boost.

Lastly, make sure your machine has a ton of ram. Since the files aren't often updated, linux will end up caching most of them to ram if it's got free space. If your usage patterns are right, this will give you a massive speed boost.

Linux – How to copy a directory tree but not the files in Linux

Just found this:

rsync -a -f"+ */" -f"- *" source/ destination/

http://psung.blogspot.com/2008/05/copying-directory-trees-with-rsync.html

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