问题
It is not Ctrl+Z. That is for SIGTSTP. Also, stty -a shows ^S as the combination but it doesn't seem to work.
回答1:
There is no key combination to send SIGSTOP.
Control-S tells the terminal driver to suspend output, but does not send a signal to the process. Control-Q resumes output.
来源：https://stackoverflow.com/questions/8513923/what-is-the-key-combination-to-send-a-sigstop-signal-on-terminal