Using Jad on Ubuntu 8.04
If you try to decomple using jad on ubuntu
And you get:
" error while loading shared libraries: libstdc++-libc6.2-2.so.3: cannot open shared object file: No such file or directory"
type this:
sudo apt-get install libstdc++2.10-glibc2.2

Comments
For newer Ubuntu's version
http://doit.juii.net/softwareentwicklung/669