新进程是新进程组的根进程。
为了防止这类问题的产生，于是就有了孤儿进程组的概念。
When a process group becomes an orphan, its processes are sent a SIGHUP signal.
您也可以使用它向任何组或者进程发出信号。
例如，同一台计算机上的三个实例就需要三组后台进程。
For example, three instances in one machine will require three set of background processes.
跟上图是同一组数据，不过下面的图包括了所有的进程。
Here is the same view, but with the data from all processes visible.
sem_perm . cgid和sem_perm . gid被设置为调用进程的有效组id。
Sem_perm.cgid and sem_perm.gid are set to the effective group id of the calling process.
可以用此命令方便地在一组服务器上停止同一守护进程。
The command is handy for stopping the same daemon on a collection of servers.
WebSphereApplicationServercell中的每个进程都是核心组的一员。
Every process in a WebSphere Application Server cell is a member of a core group.
每个进程都有它自己的一组页表，但这里有一个问题。
Each process has its own set of page tables, but there is a catch.
每个进程都有它自己的一组页表，但这里有一个问题。
Each process has its own set of page tables, but there is a catch.
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