wget --no-check-certificate https://github.com/pypa/pip/archive/1.5.5.tar.gz
tar zvxf 1.5.5.tar.gz    #解压文件
cd pip-1.5.5/
python setup.py install
这样就安装好pip了

说明：如果报错：ImportError No module named setuptools

wget http://pypi.python.org/packages/source/s/setuptools/setuptools-0.6c11.tar.gz
tar zxvf setuptools-0.6c11.tar.gz
cd setuptools-0.6c11
python setup.py build
python setup.py install