Re: [monitoring-plugins/monitoring-plugins] Update .travis.yml (#1440)

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I'd say both works. Your solution is nicer because it doesn't run grep and
wc with sudo. But we can just remove sudo completly, because `ip addr show`
works with user permissions as well and we just need to keep the sudo before
the `sed`.

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<p>I'd say both works. Your solution is nicer because it doesn't run grep a=
nd wc with sudo. But we can just remove sudo completly, because <code>ip ad=
dr show</code> works with user permissions as well and we just need to keep=
 the sudo before the <code>sed</code>.</p>

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