$easy_install simplejson
Searching for simplejson
Reading
Download error on : [Errno 1] _ssl.c:510: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed -- Some packages may not be found!
Couldn't find index page for 'simplejson' (maybe misspelled?)
Scanning index of all packages (this may take a while)
Reading
Download error on [Errno 1] _ssl.c:510: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed -- Some packages may not be found!
No local packages or download links found for simplejson
error: Could not find suitable distribution for Requirement.parse('simplejson')
解决：
sudo yum install openssl-devel
