Fetch innotop from its GIT repository:
sudo apt-get install git git clone https://github.com/innotop/innotop.git
Install any missing Perl dependency:
sudo apt-get install libclass-db sudo apt-get install libterm-readkey-perl
cd innotop/ perl Makefile.PL
If there no warnings and errors (in case you have to fix other dependencies), proceed with the installation of this good MySQL InnoDB real time monitor:
sudo apt-get install make sudo make install
Innotop can be launched in several ways, the easiest is to provide, on the command line, username and password (with -u [user] and -p [password]) of a privileged user. Of course you have to consider that this information will remain on your history and on the process description (while running!) - use it only locally and not on production!