Which kill command signal will immediately stop a process with NO graceful exit? -9 SIGKILL -15 SIGTERM -19 SIGSTOP -31 SIGSYS

The kill command signal that will immediately stop a process with no graceful exit is -9 SIGKILL.

Here's why:

• SIGKILL (-9): This signal immediately terminates the process. The process cannot ignore it and it does not get any chance to clean up.

• SIGTERM (-15): This is the default signal sent by the kill command. It requests a process to terminate, but it can be ignored. The process is given a chance to gracefully shutdown.

• SIGSTOP (-19): This signal causes the process to stop, but it doesn't terminate the process. The process can be resumed later with a SIGCONT signal.

• SIGSYS (-31): This signal is sent when the system call has a bad argument, but it doesn't necessarily stop the process immediately.

So, the answer is -9 SIGKILL.