Although the last time I tried it (bit of a long time ago actually), well it was really stable and fast but it did feel somewhat "sluggish" when it comes to minimizing or maximizing windows (with few delays just as with Openbox).
But if you want to give a try at this resource friendly window manager in Ubuntu, then the installation is pretty simple actually since it's in the official repositories. You can install Fluxbox in Ubuntu 11.04, 11.10, 10.10 and 10.04 by using the below command.
sudo apt-get install fluxboxBut as a Ubuntu 11.04 Natty Narwhal user, if you want to use the latest builds of Fluxbox window manager, then you can certainly make some use out of the dedicated PPA channel (thanks to Paul).
But remember, it includes the "Nightly Builds", so the packages may not be the most stable ones out there thus should only be used for testing purposes or if you want to get the latest updates of Fluxbox (and other related packages) but okay with the fact that it might drift you towards a bit of an unstable system (yikes).
To add it to Natty and install the latest builds you can use the below commands. As usual, open your terminal and enter the below commands.
sudo add-apt-repository ppa:fluxbox-maintainers/nightlyThen log-out and on the GDM log-in screen, just choose "fluxbox" under session. That should do the trick. But remember, this fluxbox WM only supports Gnome and KDE desktops + it will not support Unity or Gnome Shell interfaces since they're build using entirely different, a bit advanced compositing WM such as Compiz and Mutter.
sudo apt-get update
sudo apt-get install fluxbox
But don't hope to get the same level of features with fluxbox as with Gnome or KDE for instance because at the end you'll be disappointed!.
And while using the "Fluxbox" desktop session, if you launch apps such as Nautilus file manager, then you'd run into trouble because Nautilus will try to replace the desktop management instead of fluxbox!.
But as a quick solution, we can disable Nautilus for dealing with your desktop. To do that, open the terminal window and enter the below command.
Then from the window that you get, go to: "apps" -> "nautilus" -> "preferences".
Now to your right-side scroll down until you see a setting called "show desktop" (as with below screenshot). Remove the check mark and it should solve your problem.
|This will also disable desktop icons, etc in Gnome classic and Unity too. So, unless you're gonna be using Fluxbox as your primary somewhat desktop... then this could be a headache :)...|