Remove useless cat usage

[bebehei]

Remove the useless redirection of cat.

[linux-foundation-easycla]

• ✅login: bebehei / (2afb69a)

The committers listed above are authorized under a signed CLA.

[k8s-ci-robot]

Welcome @bebehei!

It looks like this is your first PR to kubernetes/website 🎉. Please refer to our pull request process documentation to help your PR have a smooth ride to approval.

You will be prompted by a bot to use commands during the review process. Do not be afraid to follow the prompts! It is okay to experiment. Here is the bot commands documentation.

You can also check if kubernetes/website has its own contribution guidelines.

You may want to refer to our testing guide if you run into trouble with your tests not passing.

If you are having difficulty getting your pull request seen, please follow the recommended escalation practices. Also, for tips and tricks in the contribution process you may want to read the Kubernetes contributor cheat sheet. We want to make sure your contribution gets all the attention it needs!

Thank you, and welcome to Kubernetes. 😃

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
Once this PR has been reviewed and has the lgtm label, please assign natalisucks for approval. For more information see the Code Review Process.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• content/en/docs/OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[netlify]

✅ Pull request preview available for checking

Built without sensitive environment variables

Name	Link
🔨 Latest commit	2afb69a
🔍 Latest deploy log	https://app.netlify.com/sites/kubernetes-io-main-staging/deploys/67b749b4d7c9fc0008c2b973
😎 Deploy Preview	https://deploy-preview-49846--kubernetes-io-main-staging.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[bart0sh]

nit:

Suggested change

	sudo tee /etc/sysctl.d/k8s.conf <<EOF
	echo 'net.ipv4.ip_forward = 1' | sudo tee /etc/sysctl.d/k8s.conf

[bebehei]

Well then. Let's do it right in the right way 😄

Suggested change

	sudo tee /etc/sysctl.d/k8s.conf <<EOF
	sudo tee /etc/sysctl.d/k8s.conf <<<'net.ipv4.ip_forward = 1'

[bebehei]

This doesn't seem to be the only use of cat <<EOF | <command>

I'll rework this tomorrow with a sed if no one is objecting in general.

[bebe:~/code/kubernetes/website] patch-1(+1/-3) ± git grep 'cat\s*<<EOF\s*|\s*[a-zA-Z0-9]' | wc -l
89
[bebe:~/code/kubernetes/website] patch-1(+1/-3) ± 

[sftim]

Honestly, I think the existing approach is easier to explain and learn, even if you can save a process. You don't even need tee here.

Folks who know Linux to work out the equivalent commands are welcome to do that; our audience includes people who can't.

[bebehei]

@sftim thanks for your wise words.

Folks who know Linux to work out the equivalent commands are welcome to do that; our audience includes people who can't.

I acknowledge, there are parts of the audience, who do not understand the differences between the details we're talking about here in the PR. And I think we can agree, they do not need to understand.

cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
<filecontents>
EOF

sudo tee /etc/sysctl.d/k8s.conf <<EOF
<filecontents>
EOF

cat > /etc/sysctl.d/k8s.conf <<EOF
<filecontents>
EOF

Honestly, I think the existing approach is easier to explain and learn, even if you can save a process.

I prefer readable commands, which are mostly copy-pastable and comprehensible. Having comprehensible commands serves all audiences of any experience level.

But how do you conclude, the first example is easier to comprehend than the second or the third?

[sftim]

But how do you conclude, the first example is easier to comprehend than the second or the third?

I've taught lots of people how to use Linux. I think the mental model people have to build for the first one is easiest.