*/15 * * * * /bin/15min_backup > /dev/stdout 2>&1
0 * * * * /bin/hourly_backup > /dev/stdout 2>&1
0 0 * * * /bin/daily_backup > /dev/stdout 2>&1
0 0 * * 0 /bin/weekly_backup > /dev/stdout 2>&1
0 0 1 * * /bin/monthly_backup > /dev/stdout 2>&1
#