linux 下easy_install 安装python模块出现问题[Errno -3]，求指导

qianyemlf

[root@node201 bin]# easy_install itertools
Searching for itertools
Reading ##
Download error: [Errno -3] Temporary failure in name resolution -- Some packages may not be found!
Reading ##
Download error: [Errno -3] Temporary failure in name resolution -- Some packages may not be found!
Couldn't find index page for 'itertools' (maybe misspelled?)
Scanning index of all packages (this may take a while)
Reading ##
Download error: [Errno -3] Temporary failure in name resolution -- Some packages may not be found!
No local packages or download links found for itertools
error: Could not find suitable distribution for Requirement.parse('itertools')