If you cancel some commands, processes are left running in the background:
$ pgrep -lf python
$ dcos riak cluster wait-for-service
^CUser interrupted command with Ctrl-C
$ pgrep -lf python
56351 /Users/sanmiguel/.dcos/subcommands/riak/env/bin/python2.7 /Users/sanmiguel/.dcos/subcommands/riak/env/bin/dcos-riak riak cluster wait-for-service
If you cancel some commands, processes are left running in the background: