Free Discovering System Processes Part II Tutorial

When processes talk to each other, it is called interprocess communication. Processes aren’t allowed to say just anything to each other; instead, your FreeBSD system comes with 31 possible predefined messages. These messages are called signals; you can view these signals with this command:kill -lHUP INT QUIT ILL TRAP ABRT EMT FPE KILL BUS SEGV SYS PIPE ALRM TERM URG STOP TSTP CONT CHLD TTIN TTOU IO XCPU XFSZ VTALRM PROF WINCH INFO USR1 USR2 Each signal has a numerical equivalent, and  
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