For instance, on Mac OS X, the wall utility — short for "write all," because it writes a message to every physical or virtual terminal device — is setgid tty (as shown above).
例如，在Mac OS X中，wall工具(“write all”的缩写，因其会将某个消息写入所有物理或虚拟终端设备而得名)的setgid被设为tty(如上所示)。
2
The JPS utility lists the virtual machines for the current user on the target system.
jps工具为目标系统的当前用户列出虚拟机。
3
The created images are saved using the UWF format, which is also the only virtual disk extension recognized by the utility.