Q:

Quickly kill processes containing word

$ ps aux | grep ruby
user              1565   3.7  0.1  4307464  17696 s000  S+    7:31AM   0:00.61 /Users/user/.rbenv/versions/2.3.1/bin/ruby bin/rails c
user              1579   0.0  0.0  4268020    788 s001  S+    7:31AM   0:00.00 grep ruby
user              1489   0.0  0.0        0      0   ??  Z     7:29AM   0:00.00 (ruby)

How do I quickly kill all these processes?
What I tried:
kill -9 `ps aux | grep ruby`

My environment:
$ bash --version
GNU bash, version 3.2.57(1)-release (x86_64-apple-darwin18)
Copyright (C) 2007 Free Software Foundation, Inc.
$ uname -a
Darwin MacBook-Pro.local 18.0.0 Darwin Kernel Version 18.0.0: Wed Aug 22 20:13:40 PDT 2018; root:xnu-4903.201.2~1/RELEASE_X86_64 x86_64
$

A:

As Haxiel commented, my recommendation would be to use pkill:
pkill -9 ruby

