File "/bin/yum", line 30 except KeyboardInterrupt, e:
由於yum包使用python2*等開發,修該爲環境修改python3以後有問題,
修改文件`/usr/bin/yum`、`/usr/libexec/urlgrabber-ext-down`將頭中相應python更改成`#!/usr/bin/python2.7`