On Linux, use:
+
[source, subs="+quotes"]
----
sed -i 's/namespace: .\*/namespace: _my-namespace_/' install/cluster-operator/*RoleBinding*.yaml
----
+
On MacOS, use:
+
[source, subs="+quotes"]
----
sed -i '' 's/namespace: .\*/namespace: _my-namespace_/' install/cluster-operator/*RoleBinding*.yaml
----