If you ever upgraded/installed 13.10 Saucy Salamander, you might have this issue after installing the latest Android SDK package for Linux :
me@me:~/adt-bundle-linux-x86_64-20130917/sdk/platform-tools$ ./adb devices
bash: ./adb: No such file or directory
The reason is that the ia32-libs package is not available anymore in Saucy.
Instead, you have to do :
sudo apt-get install lib32stdc++6
to get back on your feet and be able to play with adb again ;-)
Credits :
https://plus.google.com/105743916299158661374/posts/YL57cir9BKu