问题
I'm using mac/linux and I know that ctrl-z stops the currently running command in terminal, but I frequently see the process is still running when i check the system monitor. What is the right way to stop a command in terminal?
Typically I run into this issue when running python or ruby apps, i'm not sure if that has something to do with it, just thought I would add that.
回答1:
Using control-z suspends the process (see the output from stty -a which lists the key stroke under susp). That leaves it running, but in suspended animation (so it is not using any CPU resources). It can be resumed later.
If you want to stop a program permanently, then any of interrupt (often control-c) or quit (often control-\) will stop the process, the latter producing a core dump (unless you've disabled them). You might also use a HUP or TERM signal (or, if really necessary, the KILL signal, but try the other signals first) sent to the process from another terminal; or you could use control-z to suspend the process and then send the death threat from the current terminal, and then bring the (about to die) process back into the foreground (fg).
Note that all key combinations are subject to change via the stty command or equivalents; the defaults may vary from system to system.
回答2:
if you do ctrl-z and then type exit it will close background applications.
Ctrl+Q is another good way to kill the application.
回答3:
Take a look at Job Control on UNIX systems
If you don't have control of your shell, simply hitting ctrl + C should stop the process. If that doesn't work, you can try ctrl + Z and using the jobs and kill -9 %<job #> to kill it. The '-9' is a type of signal. You can man kill to see a list of signals.
来源：https://stackoverflow.com/questions/8221922/proper-way-to-exit-command-line-program