Ubuntu/Debian:
cp certs/domain.crt /usr/local/share/ca-certificates/myregistrydomain.com.crt update-ca-certificates
CentOS / Red Hat Enterprise Linux:
cp certs/domain.crt /etc/pki/ca-trust/source/anchors/myregistrydomain.com.crt update-ca-trust
Oracle Linux:
update-ca-trust enable