From here. The key is:

1. use pipe;

2. get the PID by using the “cut” command on the output of the “jps/ps” command and send the PID to the “kill” command.

1. The original commands.

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> jps           
13153 Jps
12819 Bootstrap
> kill -15 12819

2. The one line command.

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jps | grep Bootstrap | cut -d' ' -f1 | xargs kill -15