Whatever key sequence is used, the operating system sends the proper signal to interrupt the process. The termination of a child process. Expiration of a timer or alarm. A call to kill or raise by the same process. A call to kill from another process.
Signals are a limited but useful form of interprocess communication.
The various kinds of signals are listed and described in detail in section Standard Signals . Go to the first , previous , next , last section, table of contents .