Difference between revisions of "Kernel Competence"

From GhostBSD Wiki
Jump to: navigation, search
(Modules)
(Loading and Unloading Modules on a running System)
Line 21: Line 21:
 
Loading and unloading kernel modules is done with [https://www.freebsd.org/cgi/man.cgi?query=kldload&apropos=0&sektion=8&manpath=FreeBSD+12.1-RELEASE+and+Ports&arch=default&format=html kldload(8)] and [https://www.freebsd.org/cgi/man.cgi?query=kldunload&apropos=0&sektion=8&manpath=FreeBSD+12.1-RELEASE+and+Ports&arch=default&format=html kldunload(8)].
 
Loading and unloading kernel modules is done with [https://www.freebsd.org/cgi/man.cgi?query=kldload&apropos=0&sektion=8&manpath=FreeBSD+12.1-RELEASE+and+Ports&arch=default&format=html kldload(8)] and [https://www.freebsd.org/cgi/man.cgi?query=kldunload&apropos=0&sektion=8&manpath=FreeBSD+12.1-RELEASE+and+Ports&arch=default&format=html kldunload(8)].
  
 
+
Example: You want to load ''vboxdrv.ko,'' listed in ''/boot/[[Modules|modules]]/vboxdrv.ko'' as a third-party kernel module. You simply chop of ''/boot/modules/''  and ''.ko'' and write in a terminal:<br/>
 
+
<code><nowiki>#</nowiki>kldload vboxdrv</code>
 
+
  
 
===Loading modules at Boot===
 
===Loading modules at Boot===

Revision as of 06:42, 26 February 2020

Welcome to Icon Disti GhostBSD.png Kernel Competence.
Kernel Competence
Sysctl Kldstat Third-party Kernel Modules
Kernel Modules FreeBSD Ports: Kld Kenv
Back to the Icon Disti GhostBSD.pngSystem

Introduction

On this page and its sub-pages we will collect all information connect to the kernel, like managing kernel modules, retrieve information from the kernel and use special commands.

Kernel

The kernel is the interface between the hardware and the software. The kernel lets the software write data to disk drives and to network. When a program needs memory, the kernel handles the access to the physical memory chip. When a program requests CPU time, the kernel organizes it. The kernel provides all the software interfaces that a program needs, in order to access hardware resources.

To follow the UNIX philosophy: to minimalist, modular software development the Ghost/FreeBSD kernel is set together out of modules. If a hardware requires a special piece of software, a appropriate module has to be loaded in to the working memory. Not needed modules stay on the hard disc or the software repositories.

Modules

The kernel and any modules included with GhostBSD are files in the directory /boot/kernel. Third-party modules are located in /boot/modules. Not all modules are loaded by default. If needed, one can load them later.
All files elsewhere on the system or in the ports called the userland, meaning they are intended for users even if they use kernel facilities.

Loading and Unloading Modules on a running System

Loading and unloading kernel modules is done with kldload(8) and kldunload(8).

Example: You want to load vboxdrv.ko, listed in /boot/modules/vboxdrv.ko as a third-party kernel module. You simply chop of /boot/modules/ and .ko and write in a terminal:
#kldload vboxdrv

Loading modules at Boot

Normally you want to load a kernel module automatically at boot . So you have to use /boot/loader.conf.

Kernel Tools