error: command 'gcc' failed with exit status 1 缺gcc环境：
yum install -y gcc
yum install -y libffi-devel python-devel openssl-devel
Python没有安装pip:
yum install python-pip
下载psutil
wget https://pypi.python.org/packages/source/p/psutil/psutil-3.2.2.tar.gz(https://pypi.python.org/packages/source/p/psutil/psutil-3.2.2.tar.gz)
当前目录安装：
tar -xf psutil-3.2.2.tar.gz
cd psutil-3.2.2
python setup.py install
