CentOS下pip pkg_resources.DistributionNotFound: The 'pip==1.5.4' distribution was not found ...

报错信息：

pkg_resources.DistributionNotFound: The 'pip==1.5.4' distribution was not found and is required by the application

根据提示信息可以知道distribution没有安装，所以就安装一下：

$wget http://pypi.python.org/packages/source/d/distribute/distribute-0.6.10.tar.gz
$tar -xzvf distribute-0.6.10.tar.gz
$cd distribute-0.6.10
$python setup.py install

然后安装pip 1.5.4

easy_install pip==1.5.4

现在运行scrapy报错：

bash: scrapy: command not found

这就是Path里没有找到scrapy，现在scrapy在/usr/local/bin/scrapy里，所以在Path里做一个软连接到这儿就可以。

$cd /usr/bin/ | ll | grep scrapy  # 检查是否存在
$ln -s /usr/local/bin/scrapy /usr/bin/scrapy  # 新建一个软连接
$scrapy list  # 测试成功

参考：
https://blog.csdn.net/daiyutage/article/details/69945850
https://blog.csdn.net/EDDYCJY/article/details/77482228?locationNum=6&fps=1