Oracle GoldenGate Marketplace: How to change user to root

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Hi guys,

I created a VM from Oracle GoldenGate Marketplace (for migration purpose). As with any compute instance, when I connect to it, it connects me as opc user. But from there, I cannot switch to the root user. I need to perform some changes on the /etc/hosts file and I couldn't do that. The following command fails:

sudo su -

It returns an error that the user is not enabled.

Any idea on how to resolve the issue please?

Thanks