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Where is the Linux kernel source code located after installation?

Ubuntu 13

The Linux kernel is the core of any Linux-based operating system, including distributions like Ubuntu, Fedora, and Debian. It’s the bridge between your software and hardware, managing resources and executing processes. If you’re a developer, system administrator, or just a Linux enthusiast, you might be interested in exploring the Linux kernel source code. In this article, we’ll guide you on where to find the Linux kernel source code after installation.

Quick Answer

The Linux kernel source code is typically located in the /usr/src directory after installation. You can find a compressed archive of the source code in this directory, which can be extracted using the tar command. Once extracted, you can explore the kernel source code by navigating to the extracted directory.

Understanding the Linux Kernel Source Code

The Linux kernel source code is a collection of files written in C and assembly language. It contains all the instructions and functions that the operating system uses to interact with hardware. The source code is open-source, meaning it’s freely available for anyone to view, modify, and distribute.

Locating the Linux Kernel Source Code

The kernel source code installed by the linux-source package is typically located in the /usr/src directory. After installing the package, you can find a compressed archive of the kernel source code in this directory. The name of this archive will depend on your specific Linux distribution and version. For instance, if you’re using Ubuntu 14.04 LTS, the kernel source archive might be named linux-source-3.13.0.tar.bz2.

Extracting the Linux Kernel Source Code

To view the source code, you’ll need to extract the compressed archive. You can do this using the tar command followed by the jxf option. Here’s what the command looks like:

tar jxf /usr/src/linux-source-3.13.0.tar.bz2

In this command, tar is the name of the program used to handle archives, jxf is an option that tells tar to extract (x) a bzip2 compressed (j) file, and /usr/src/linux-source-3.13.0.tar.bz2 is the path to the archive you want to extract. After running this command, the source code files will be extracted into your current directory.

Exploring the Linux Kernel Source Code

Once the files are extracted, you can navigate to the extracted directory to explore the kernel source code. You can use the cd command to change directories:

cd linux-source-3.13.0

From here, you can use commands like ls to list the files and directories, and cat or less to view the contents of specific files.

Building Your Own Custom Kernel

If you’re interested in building your own custom kernel, you can refer to the Ubuntu help document on compiling your own kernel for detailed instructions.

Additional Resources

For more information and answers to related questions, you can refer to the following resources:

  • Where can I find the source code for the Ubuntu Kernel?
  • Is the Ubuntu kernel open source and available for download and building?
  • How do I get the kernel source code?

In conclusion, the Linux kernel source code is a powerful resource for understanding the inner workings of the Linux operating system. By knowing where to find it and how to extract it, you can dive deep into the code that powers your system.

What is the purpose of the Linux kernel source code?

The Linux kernel source code contains all the instructions and functions that the operating system uses to interact with hardware. It is responsible for managing resources and executing processes.

Where can I find the Linux kernel source code after installation?

The kernel source code installed by the linux-source package is typically located in the /usr/src directory.

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