cd pyrit_svn/pyrit/
python setup.py build
python setup.py install

mohax@PC:~/pyrit_svn/pyrit$ python setup.py build
running build
running build_py
running build_ext
running build_scripts
mohax@PC:~/pyrit_svn/pyrit$ python setup.py install
running install
running build
running build_py
running build_ext
running build_scripts
running install_lib
writing byte-compilation script '/tmp/tmpNTJD5Q.py'
/usr/bin/python -O /tmp/tmpNTJD5Q.py
removing /tmp/tmpNTJD5Q.py
running install_scripts
changing mode of /usr/local/bin/pyrit to 755
error: [Errno 1] Operation not permitted: '/usr/local/bin/pyrit'
mohax@PC:~/pyrit_svn/pyrit$