#!/bin/sh

beginTime=`date +%s`


# 
# 顺序执行，用时18秒
# 
sh ./child/c1.sh
sh ./child/c2.sh

# 
# 并行后台执行，用时10秒 需要wait等待执行完成
# 
# sh ./child/c1.sh &
# sh ./child/c2.sh &

wait

endTime=`date +%s`

echo "执行结束...，总共耗时：" $(($endTime-$beginTime)) "秒！"

• c1.sh

#!/bin/sh

echo "c1.sh 执行开始 ..."

sleep 8s

echo "c1.sh 执行结束 ..."

• c2.sh

#!/bin/sh

echo "c2.sh 执行开始 ..."

sleep 10s

echo "c2.sh 执行结束 ..."