If you are using ADT (Android Developer Tools) on Linux 64bit, you will get the following kinds of error :
error while loading shared libraries: **libz.so.1: cannot open shared object file: No such file or directory**
You can fix this issue by simply installing the 32bit drivers
sudo apt-get install libc6-i386 lib32stdc++6 lib32gcc1 lib32ncurses5
This error happend because ADT compiled using 32bit compiler and need 32bit libraries on Linux to work properly.