ipcs command zz

ipcs [ -asmq ] [ -tclup ]
ipcs [ -smq ] -i id
-m 显示共享内存
-q 显示消息队列
-s 显示信号灯
-a 显示所有信息，默认为该选项
ipcs #显示所有信息，包括消息队列、共享内存、信号灯，与命令ipcs –a等价
$ ipcs

------ Shared Memory Segments --------
key shmid owner perms bytes nattch status

------ Semaphore Arrays --------
key semid owner perms nsems

------ Message Queues --------
key msqid owner perms used-bytes messages


$ipcs -m #显示共享内存信息
$ ipcs -m

------ Shared Memory Segments --------
key shmid owner perms bytes nattch status


$ipcs -s #显示信号灯信息
$ ipcs -s

------ Semaphore Arrays --------
key semid owner perms nsems


$ipcs -q #显示消息队列信息
$ ipcs -q

------ Message Queues --------
key msqid owner perms used-bytes messages