- cat <<EOF >>user_config.sh
-
-#Use a registry mirror for downloading container images
-export DOCKER_REGISTRY_MIRRORS="${DOCKER_REGISTRY_MIRRORS}"
-EOF
+ sed -i -e 's/DOCKER_REGISTRY_MIRRORS=.*/DOCKER_REGISTRY_MIRRORS="'"${DOCKER_REGISTRY_MIRRORS}"'"/' ${ICNDIR}/user_config.sh
+else
+ sed -i -e 's/DOCKER_REGISTRY_MIRRORS=.*/DOCKER_REGISTRY_MIRRORS=""/' ${ICNDIR}/user_config.sh