Run cron on all sites on a server (works with multisite) - Thanks to https://gist.github.com/bjornjohansen/a00a9fee5475c4dadb56

run-wp-cron.sh

#!/bin/bash
# Copyright © 2018 Matt Barrett - https://github.com/corradomatt
# Special thanks to https://gist.github.com/bjornjohansen/a00a9fee5475c4dadb56
# This work is free. You can redistribute it and/or modify it under the
# terms of the Do What The Fuck You Want To Public License, Version 2,
# as published by Sam Hocevar. See http://www.wtfpl.net/ for more details.

HTML_ROOT="/var/www/html"
WP_CLI="/usr/local/bin/wp"
SITES=$(find $HTML_ROOT ! -path $HTML_ROOT -maxdepth 1 -type d -exec echo {} \;)
for WP_PATH in $SITES ; do

    # If WordPress isn't installed here, we move on
    if ! $(${WP_CLI} core is-installed --path="$WP_PATH" --quiet); then
        echo "WordPress is not installed here: ${WP_PATH}"
        continue
    fi

    # Get a list of site URLs
    if $($WP_CLI core is-installed --path="$WP_PATH" --quiet --network); then
        SITE_URLS=`${WP_CLI} site list --fields=url --archived=0 --deleted=0 --format=csv --path="$WP_PATH" | sed 1d`
    else
        SITE_URLS=(`${WP_CLI} option get siteurl --path="$WP_PATH"`)
    fi

    # Loop through all the sites
    for SITE_URL in $SITE_URLS
    do
        ${WP_CLI} cron event run --due-now --url="$SITE_URL" --path="$WP_PATH" --quiet
    done

done