In this hands-on project, you use kill signals to terminate processes on your system.
1. Switch to a command-line terminal (tty2) by pressing Ctrl+Alt+F2 and log in to the terminal using the user name of root and the password of secret.
2. At the command prompt, type ps –ef | grep bash and press Enter to view the BASH shells that are running in memory on your computer. Record the PID of the BASH shell running in your terminal (tty2): _______________.
3. At the command prompt, type kill –l and press Enter to list the available kill signals that you can send to a process.
4. At the command prompt, type kill -2 PID (where PID is the PID that you recorded in Step 2) and press Enter. Did your shell terminate?
5. At the command prompt, type kill -3 PID (where PID is the PID that you recorded in Step 2) and press Enter. Did your shell terminate?
6. At the command prompt, type kill -15 PID (where PID is the PID that you recorded in Step 2) and press Enter. Did your shell terminate?
7. At the command prompt, type kill -9 PID (where PID is the PID that you recorded in Step 2), and press Enter. Did your shell terminate? Why did this command work when the others did not?
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