9. 同步执行Linux多条命令

docker exec demo3 /demo/st reload-data online;

docker exec demo4 /demo/st reload-data online;

docker exec demo5 /demo/st reload-data online;

docker exec demo6 /demo/st reload-data online;

docker exec demo7 /demo/st reload-data online;

docker exec demo8 /demo/st reload-data online;