jdu is a graphical front-end for the output generated by the
du program. du reports the disk usage of a
particular directory tree by recursively summarizing how much disk space is
used by the sub-directories of the chosen root directory. du is
a useful tool when it comes to cleaning up the hard disk because of disk
space shortage (which should be less and less the case with ever growing
hard disks - interestingly enough, though, that it is still necessary). The
major drawback of the du program is, that it is difficult to
intuitively grasp the information that it gives to the user because the
information is presented in textal form only. To overcome this difficulty,
some operating systems had a program called xdu that could be
used to visualize the data produced by du. Although I have been
looking for the xdu program for some time, I was not able to
find it any longer. Neither do I know if it was distributed under a public
license such that I could have ported it to the platform(s) I
need. Therefore, I decided to write a graphical front-end similar to
xdu myself. To have the functionality available on different
platforms, I used the Java programming language to increase the portability
of the resulting program.
However, since the du program is not available on the Windows
platform, the jdu package also contains a very rudimentary
version of the du called dujthat can be used to
report the disk usage on a Windows computer. The output produced by
duj is not the same as that produced by the original program
mainly because the original program reports the disk usage in terms of used
blocks. duj, on the other hand, simply summarizes the file
sizes of the files in a particular directory and will therefore usually
report a slightly smaller disk usage. This is due to the fact that blocks
may not be completely filled but the original version of du
naturally reports them as unusable for other files. However, the differences
are small and the main intend of jdu is to identify the big
'black holes' on a hard disk and therefore the approximative report of
duj program should be sufficient.
jdu from
jdu [-file filename] [-minsize n] [-alert [n] [-interactive]]
du | jdu [-minsize n] [-alert [n]]
duj | jdu [-minsize n] [-alert [n]]
file filename |
The name of the the file where the du output is read from. If no
file is specified, jdu reads its input from
stdin |
minsize n |
Consider only directories that are larger than n kb. |
alert [n] | Highlight directories that are
larger than n kb. Default is read from
default.properties. |
interactive | Do not show an initial directory tree. |
f |
Fit to window |
q |
Quit |
s |
Bring up the scaling dialog. |
u |
Move sliders to upper left corner. |
z |
Zoom out. |
Z |
Zoom in |
Cursor keys |
Move sliders |
Ctrl + cursor keys |
Jumps sliders |
| de.agentlab.jdu.minsize | 0 |
| de.agentlab.jdu.renderer.alert | false |
| de.agentlab.jdu.renderer.alertsize | 10000 |
| de.agentlab.jdu.renderer.bgcolor | 255,228,196 |
| de.agentlab.jdu.renderer.drawcolor | 0,0,0 |
| de.agentlab.jdu.renderer.alertcolor | 255,0,0 |
| de.agentlab.jdu.renderer.headskip | 5 |
| de.agentlab.jdu.renderer.bottomskip | 5 |
| de.agentlab.jdu.renderer.blockwidth | 100 |
| de.agentlab.jdu.renderer.initialheight | 600 |
| de.agentlab.jdu.renderer.fontsize | 8 |
| de.agentlab.jdu.keycontrols.fit | F |
| de.agentlab.jdu.keycontrols.quit | Q |
| de.agentlab.jdu.keycontrols.scale | S |
| de.agentlab.jdu.keycontrols.upper_left_corner | U |
| de.agentlab.jdu.keycontrols.zoom_in | shift Z |
| de.agentlab.jdu.keycontrols.zoom_out | Z |
| de.agentlab.jdu.keycontrols.scroll_left | LEFT |
| de.agentlab.jdu.keycontrols.jump_left | control LEFT |
| de.agentlab.jdu.keycontrols.scroll_right | RIGHT |
| de.agentlab.jdu.keycontrols.jump_right | control RIGHT |
| de.agentlab.jdu.keycontrols.scroll_up | UP |
| de.agentlab.jdu.keycontrols.jump_up | control UP |
| de.agentlab.jdu.keycontrols.scroll_down | DOWN |
| de.agentlab.jdu.keycontrols.jump_down | control DOWN |