Du
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Name
du - estimate file space usage
Synopsis - man page
du [OPTION]... [FILE]... du [OPTION]... --files0-from=F
Frequently used options
-h, --human-readable
print sizes in human readable format (e.g., 1K 234M 2G)
-s, --summarize
display only a total for each argument
--max-depth=N
print the total for a directory (or file, with --all) only if it
is N or fewer levels below the command line argument;
--max-depth=0 is the same as --summarize
Examples
du is abbreviation of "disk usage". This command tool reports usage by given directory. Lets suppose that we have this directory structure in /tmp:
$ cd /tmp $ mkdir -p dir1/dir2/dir3 $ tree dir1
By default du command traverse whole directory structure:
$ du dir1
by option -s we instruct du command to print total just for given argument. In our case the argument is dir1.
$ du -s dir1
We can do the same by --max-depth=N:
$ du --max-depth=0 dir1
Lets se how it works on /var directory:
# du -s /var
# du --max-depth=1 /var
If its hard for you to read size in bytes you can instruct du to display size in human readable format:
# du -h --max-depth=1 /var
