CentOS

I need support. I am trying to yum update but I am facing so many errors in it please help me to resolve it.

The image is missing.

It's much better to copy/paste the actual text of the message rather than an image of the screen.

You are using EPEL7 packages for your CentOS 6 installation. That will not work.

The easiest way to fix this is yum remove epel-release followed by yum install epel-release --enablerepo=extras. You may also need to issue a yum clean all afterwards.