I have received a request for help on manual installation of phpIPAM on debian linux, so I decided to write a small how-to if anyone else has problems or is not so familiar with linux distributions and environment. I have used fresh default debian 6.0 as distribution because it is widely used, I believe on ubuntu linux procedure should be very similar, except maybe for locations of some config files.
I have used the following settings for installation:
Fresh debian installation
MySQL server not yet installed and no root pass configured
Apache not installed and configured
phpipam will be installed in default directory (no vhosts) under /phpipam/ folder
If you already have MySQL/apache set you can skip point 3.