yum 업데이트 했을 때 아래와 같은 에러가 보인다면 #yum updateThere was a problem importing one of the Python modulesrequired to run yum. The error leading to this problem was: No module named yum Please install a package which provides this module, orverify that the module is installed correctly. It's possible that the above module doesn't match thecurrent version of Python, which is:2.7 (r27:82500, Aug 24 2012, 08..