Searching for pip
Reading http://pypi.python.org/simple/pip/
Couldn't find index page for 'pip' (maybe misspelled?)
Scanning index of all packages (this may take a while)
Reading http://pypi.python.org/simple/
No local packages or download links found for pip
error: Could not find suitable distribution for Requirement.parse('pip')

解决方法如下：

1 wget http://curl.haxx.se/ca/cacert.pem
2 mv cacert.pem ca-bundle.crt
3 cp ca-bundle.crt /etc/pki/tls/certs/