Ping cron for all sites in a WordPress multisite network

wp-ms-cron-ping.sh

#!/bin/bash
WP_PATH="/path/to/wp"
for SITE_URL in $(wp site list --fields=url --archived=0 --deleted=0 --format=csv --path="$WP_PATH" | sed 1d)
do
	/usr/bin/curl -L -s -o /dev/null "${SITE_URL}wp-cron.php"
done

Ref: https://www.bjornjohansen.com/wordpress-cron-wp-cli