yossman.net - "du" unix command help
document first created 1997-10-07.
document last updated 2004-01-23.
the "du" command in unix tells you how much space a directory or
set of directories and the files inside are taking up. let's say you want
to know how much space you are taking up in your home directory, and all
the subdirectories you've made off your home directory. you would simply
log into your account, and as your first command, just type
'du'. the output will look something like this:
by default on yossman.net, the numbers from 'du' will be in kilobytes (1024 bytes). on some
systems, the default is to show the sizes in '512 byte blocks', so the numbers will look
approximately doubled. this readout tells me i have 900 kilobytes (900K) in my
'mail' directory, 2K in my 'public_www' directory, and so on. the final
number, '3543', is pointing to the '.' directory, which is the current directory
you are looking at. if you have just logged in, this is the total space your home directory
and all of your subdirectories is taking up. in this case, it's telling me i have used
3543K, or approximately 3.46 megabytes (3.46MB).
you can execute this command from any directory to find out what the total amount of space that
particular directory tree is taking up on the system. for more options to use with 'du',
check the manpages for it (type 'man du').