Disable a repositorie

howto disable a repro

You have next unsupported repositories: centos-virt-xen
centos-virt-xen-epel
n2
This may cause installtion problems.
Please disable this repositories for correct installation.
Are you really want to continue? (y/N) ^C

How to do this the ssh?

quick google gives lots of choices, try this one: https://www.unixmen.com/enable-disable-repositories-centos/