How to check if I am running a uniprocessor kernel or a multiprocessor kernel?

/unix is a symbolic link to the booted kernel. To find out what kernel mode is running, enter ls -l /unix and see what file /unix it links to.
The following are the three possible outputs from the ls -l /unix command and their  corresponding kernels:
/unix -> /usr/lib/boot/unix_up                                                            # 32 bit uniprocessor kernel/unix -> /usr/lib/boot/