5. Kernel Location

When you install a new kernel, your system adds several important files to a specific directory. If you've ever wondered where is the kernel stored in Linux, the answer is typically the /boot directory. This directory is the standard Linux kernel location on most systems.

The /boot Directory

The /boot directory contains all the files needed to start the boot process. When you look inside, you'll often see files corresponding to different kernel versions, allowing you to boot into an older kernel if a new one causes issues. Understanding this kernel location is crucial for system maintenance.

Key Kernel Files

So, where is the kernel located within this directory? It's accompanied by a few other critical files. Here are the main ones you will encounter:

• vmlinuz: This is the compressed, executable Linux kernel itself. The 'z' at the end indicates that it is compressed.
• initrd: This is the initial RAM disk. As we've discussed, the initrd is a temporary root filesystem loaded into memory during startup to mount the real root filesystem.
• System.map: This file holds a symbol table, which maps kernel function names to their memory addresses. It's primarily used for debugging kernel panics and oopses.
• config: This file stores the configuration settings that were used to compile that specific kernel version. It details which drivers and features were included.

Managing Kernel Files

Over time, your /boot directory can fill up with files from old kernels. If you run out of space, you can remove the files for older, unused versions. The safest way to do this is by using your distribution's package manager (like apt or dnf). Manually deleting files can be risky, so be extremely careful not to remove the files for the kernel you are currently using.