body, table{font-family: 微软雅黑; font-size: 13.5pt}
table{border-collapse: collapse; border: solid gray; border-width: 2px 0 2px 0;}
th{border: 1px solid gray; padding: 4px; background-color: #DDD;}
td{border: 1px solid gray; padding: 4px;}
tr:nth-child(2n){background-color: #f8f8f8;}
ipcs 查看共享内存 ipcrm -m shmid 删除共享内存 ipcrm -s semid 删除信号量