To type in characters using their hexadecimal, in Ubuntu, it's not really complicated.
Let me introduce you to a new Linux distribution that I have just discovered (even though it exists for more than a year): elementary OS.
You want to configure OpenBox: Lubuntu window manager.
Here are my modifications when installing Precise Pangolin 12.04 with Lubuntu variant.
Some indications on how to manage groups and users.
Finding files on Linux (and Unix) always existed ... in command line mode (with
find and others commands) : but for a graphic mode search, that's another story and even more so with Lubuntu.
Modifications to be done after installing an Ubuntu !
I always forget how to find out, which version of the distribution I am using: here's the answer !
How to upload programs using Lubuntu.
How to revive old PCs with Linux.