The Ancient Chinese invented paper and money. Money was invented by the first king of China and paper was invented by a man in China by bamboo.
Example C Program to Catch a Signal. Most of the Linux users use the key combination Ctr+C to terminate processes in Linux. Have you ever thought of what goes behind this. Well, whenever ctrl+c is pressed, a signal SIGINT is sent to the process. The default action of this signal is to terminate the process. But this signal can also be handled.
Using the show users command described in this recipe, you can get the line number of a specific user. If the user is logged into line 66, use this command to send them a message: send 66. The command to send a message to the user on the console is as follows: send console 0.