ipcs:提供关于进程间通信(ipc)的信息

NAME
       ipcs - provide information on ipc facilities
SYNOPSIS
       ipcs [-asmq] [-tclup]
       ipcs [-smq] -i id
       ipcs -h
DESCRIPTION
       ipcs  provides  information on the ipc facilities for which the calling process has read access.
       The -i option allows a specific resource  id  to  be  specified.   Only information on this id will be printed.
       Resources may be specified as follows:
       -m     shared memory segments(内存共享段)
       -q     message queues (消息队列)
       -s     semaphore arrays (信号量数组)
       -a     all (this is the default) (前面三个都会输出)
       -i id  显示指定id的具体信息.
       The output format may be specified as follows:
       -t     time 时间
       -p     pid 进程id
       -c     creator 创建者
       -l     limits 系统对(共享内存段/消息队列/信号量数组)的限制
       -u     summary 使用统计/状态

ipcs输出内容有:

ipcs -i id -a 的相关输出:

ipcs -l 选项的输出:

ipcs -u 选项的输出:

拓展阅读:
ipcrm [删除一个…id: remove a message queue, semaphore set or shared memory id]
ipcmk[创建各种进程通信资源:create various ipc resources]