ipcs [-m/-s/-q]
默认会列出共享内存、信号量，队列信息，-m列出共享内存，-s列出共享信号量，-q列出共享队列

[root@DELL etc]# ipcs -s

------ Semaphore Arrays --------
key semid owner perms nsems
0x270b86a8 7340032 oracle 640 152
0x790ac0a9 5046273 root 666 1
0x270b86a9 7372802 oracle 640 152
0x270b86aa 7405572 oracle 640 152

[root@DELL etc]# ipcs -m

------ Shared Memory Segments --------
key shmid owner perms bytes nattch status
0x00000000 720896 root 600 393216 2 dest
0x703c7d80 2555905 oracle 640 1275875328 425
0x00000000 753667 root 600 393216 2 dest
0x00000000 786436 root 600 393216 2 dest
0x00000000 819205 root 600 393216 2 dest
0x00000000 851974 root 600 393216 2 dest
0x00000000 884743 root 600 393216 2 dest
0x790ac0a9 1376264 root 666 808 0

[root@DELL etc]# ipcs -q

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

ipcrm [-m/-s/-q] id
-m 删除共享内存，-s删除共享信号量，-q删除共享队列。

ipcrm -m shmid

ipcrm -s semid