1）错误
执行yum clean all报错File "/usr/bin/yum", line 30 except KeyboardInterrupt, e:
这是因为升级了Python3.6，yum采用python作为命令解释器，系统自带的python解释器为python2.7
[***@localhost]# yum clean all
File "/usr/bin/yum", line 30
except KeyboardInterrupt, e:
^
SyntaxError: invalid syntax
2）解决方法
修改/usr/bin/yum文件中的第一行为
#!/usr/bin/python 修改成 #!/usr/bin/python2.7
3）保存修改后再次执行yum clean all
[***@localhost yum]# yum clean all
已加载插件：fastestmirror, langpacks
Repodata is over 2 weeks old. Install yum-cron? Or run: yum makecache fast
正在清理软件源： base centos-sclo-rh epel extras updates
Cleaning up list of fastest mirrors
搞掂
