whatis linux-kernel
Linux Kernel
Also known as: kernel
The core program of a Linux system that manages hardware, memory, processes, and system calls between applications and the machine.
What Is the Linux Kernel?
The kernel is the first real program that runs after the bootloader hands over control, and it stays in memory until shutdown. It schedules processes onto CPUs, hands out memory, talks to hardware through drivers, and exposes everything else through system calls such as open, read, and fork.
Strictly speaking, "Linux" is only the kernel. The shell, coreutils, init system, and desktop you use every day come from other projects, which is why a complete system is called a distribution. You can check which kernel you are running with uname -r.
Example
uname -r
# 6.14.2-arch1-1Learn more about Linux Kernel
- Linux Kernel vs Operating System: What's the Difference? The kernel and the operating system are not the same thing. Understanding the difference explains why "Linux" runs on everything from servers to smartphones, and why your distro matters as much as the kernel inside it.
- What Is Linux? Linux is the kernel at the heart of most of the internet, Android, and a growing share of desktops. Here is what it actually is, how it got here, and why it matters in 2026.
- Kernel Modules Explained: lsmod, modprobe, and DKMS Most drivers on Linux are kernel modules, loaded and unloaded at runtime. Here is how to inspect them with lsmod and modinfo, manage them with modprobe, blacklist the troublesome ones, and understand what DKMS rebuilds.
- Kernel Command Line Parameters Explained How to read /proc/cmdline, set parameters temporarily from the GRUB menu, make them permanent, and the ones worth knowing for rescue and troubleshooting.