報(bào)錯(cuò)：
**/usr/bin/yum: line 3: import: command not found
/usr/bin/yum: line 4: try:: command not found
/usr/bin/yum: line 5: import: command not found
/usr/bin/yum: line 6: except: command not found
/usr/bin/yum: line 24: syntax error near unexpected token `('
/usr/bin/yum: line 24: `""" % (sys.exc_value, sys.version)'**
原因：升級(jí)python3導(dǎo)致
解決方式：
修改文件/usr/bin/yum、頭中相應(yīng)python為#!/usr/bin/python2.7
