Practitioner Level

Compiling a Linux Kernel (Ubuntu)

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45 minutes

5 Learning Objectives

About this Hands-on Lab

For most Linux administrators, updating a kernel is done through the package manager for the Linux distribution that is being used. However, there can be situations where a particular kernel version or specific kernel configurations are needed. In this lab, you will be tasked with downloading the full kernel source tree, updating the kernel configuration to certain specifications, and then compiling a new kernel image.

Learning Objectives

Successfully complete this lab by achieving the following learning objectives:

Enable source URIs for apt repositories.

Open the sources.lst file in /etc/apt/:
```
vim /etc/apt/sources.lst
```
Uncomment deb-src URIs manually or by substitution — :%s/# deb-src/deb-src/g
Resynchronize the package index files:
```
apt-get update
```

Install dependencies

Install additional dependencies:

apt-get install -y make gcc libncurses5-dev dpkg-dev

Build dependencies for the kernel image:

apt-get build-dep -y linux-image-$(uname -r)

Download the Kernel source tree to /usr/src

Switch to the /usr/src directory:
```
cd /usr/src/
```
Download the kernel source tree:
```
apt-get source linux-image-$(uname -r)
```

Update the kernel configuration

Switch to the kernel source tree directory:
```
cd /usr/src/linux-aws-[kernel_version]/
```
Update the kernel configuration with the make menuconfig command:
```
make menuconfig
```
Navigate with your arrow keys and use enter to go to Device Drivers > Block devices
Using the “n” key, exclude the following two drivers – DRBD Distributed Replicated Block Device support and Packet writing on CD/DVD media (DEPRECATED)
Exit the menu and save your configuration changes.

Compile the kernel image (this step can take 15-20 minutes to complete)

Create the compressed kernel image by calling the bzImage target:
```
make bzImage
```

Note: This can take 15-20 minutes to complete

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Additional Resources

As one of the lead Linux administrators on your team, you are tasked with compiling a new kernel image that will be used for all of the servers in your data center. In order to accomplish this, you will need to enable the deb-src URIs to allow the kernel source to be downloaded. Once the kernel source has been downloaded (ensure that it is downloaded to the /usr/src directory for consistency), you will need to install any dependencies that are necessary for configuring and compiling the kernel. The Distributed Replicated Block Device (DRBD) support should be excluded since your company will no longer be using this utility. In addition to DRBD, the Packet writing on CD/DVD media should also be excluded, given that it is now deprecated. Once these configuration changes have been made, compile a new compressed kernel image using the bzImage target.

Note: All tasks should be performed as the root user.

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Everything in Personal Basic, plus:
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No account setup or cloud bills

Offer applies only to: new personal and business paying customers, existing personal and business customers who switch to an annual paid plan, and any additional annual plan licenses purchased by existing business customers. Offer valid for a limited time only, beginning 10:00AM CT on February 19, 2021. Offer may not be combined with other offers. Purchases are subject to applicable Terms of Use or Master Services Agreement.

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$379 $303.20 / year

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$499 $399.20 / year

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Learn from anywhere with unlimited access to certification courses and deep dives on AWS, Azure, GCP, Linux, and so much more.

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limited

Pop quiz, hot shot

Quickly check your knowledge on a variety of topics and know where to brush up with short quizzes.

ACG Original Series

Keep up with the cloud

Stay up-to-date on all things cloud with weekly and monthly videos about the latest developments in AWS, Azure, GCP, and Kubernetes.

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Cloud with friends

Get the help you need, when you need it, from industry experts and other learners in the community — and help others in turn.

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Go from novice to guru in your chose specialty

Not sure how to proceed? We’ll guide you through the exact skills you need to gain to progress from novice to guru across a variety of cloud specialties, including Architect, Security, and DevOps.

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Keep ACG in your pocket

Learn cloud from anywhere with our mobile apps for iOS and Android.

Mobile Offline Mode

Learn off the grid

No internet connection? No problem. Download courses for offline access with our app for iOS and Android.

Unlimited Hands-on Labs

Get your hands cloudy

Learn by doing with guided labs based on real-world scenarios in a secure, risk-free environment. Build new skills in as little as 15 minutes.

Practice Exams

Put your skills to the test

Prepare for your certs with practice exams that mimic the real thing. Plus, get personalized pointers on how to improve your score.

Interactive Diagrams

Study aids on demand

Snag clickable, PDF versions of core concepts to revisit later. Our diagrams make great study aids, help build retention, and can act as handy cheat sheets for a quick refresher down the road.

Video Transcripts & Captions

For the record

Read along when sound isn’t an option and skip furiously scribbling notes. Our transcripts and captions are also fully searchable, making it easy to find exactly what you’re looking for.

Records of Completion

Achievement unlocked

Earn a little something when you complete courses. Records of completion make it easy to mark and showcase your progress.

Email Support

Cloud on demand

Spin up pre-configured, auto-provisioned servers in just a few clicks. Cloud along with courses, practice whenever you feel like it, and never worry about a surprise cloud bill.

Cloud Playground - Instant Terminal

SSH on demand

Quickly launch a secure, in-browser SSH terminal into any instance on any provider – even behind a firewall.

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Hands-on Labs

Compiling a Linux Kernel (Ubuntu)

About this Hands-on Lab

Learning Objectives

Additional Resources

Plans & Pricing

Choosing is the first step

Business Basic

Business Plus

Learning without limits

Learn faster by doing

Take your teams from novice to guru

Cloud on demand

SSH on demand

Learn by doing

Keep up with the cloud

Put skills to the test

Pop quiz, hot shot

Cloud with friends

Keep ACG in your pocket

Learn off the grid

Achievement unlocked

For the record

Study aids on demand

We’re here to help

One dashboard to rule them all

Know where you stand

Get to the cloud faster

Learn better together

Skills at a glance

Easy organization by teams

Invite 10 to 10,000 or more

Connect all the dots

Get your bits

We’ve got your back

We’ll show you the ropes

Plans & Pricing

Choosing is the first step

Free

Personal Basic

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Learn without limits

Pop quiz, hot shot

Keep up with the cloud

Cloud with friends

Go from novice to guru in your chose specialty

Keep ACG in your pocket

Learn off the grid

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Put your skills to the test

Study aids on demand

For the record

Achievement unlocked

We’re here to help

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Learn by doing

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