Workaround to bypass limitations of cron command frequency (some hosters allow to trigger cron jobs only each 15 or 30 minutes)

cron.sh

#!/bin/bash

COMMANDS[0]="php current/artisan schedule:run"
COMMANDS[1]="php current/artisan queue:work --tries=3"


ITERATIONS=30 # how often should be the commands repeated 
INTERVAL=60   # how should the pause between iterations (in seconds)

for ((i=1; i<=$ITERATIONS; i++)); do
	for COMMAND in "${COMMANDS[@]}"; do
		$COMMAND >> /dev/null 2>&1 &
	done
	sleep $INTERVAL
done