modifying kernel parameters

Core:/boot/vmlinuz-version

Kernel module:/lib/modules/version

Kernel design: Linux as a single core, modular design

Loaded in module command: Insmod, modprobe

Kernel official website: www.kernel.org

How user space accesses and monitors the kernel:/proc,/sys

Pseudo File System:

/proc/sys: Many of the files in this directory are readable and writable

/sys: Some files can be written

Methods for setting kernel parameter values

The first method of modifying the kernel:

echo VALUE >/proc/sys/dirctory/file

Modify the kernel host name: echo "server name" >/proc/sys/kernel/hostname

The second method of modifying the kernel:

Sysctl-w kernel.hostname= "server name" before this method point represents the kernel directory, which later represents the file

The above two methods of modification, after rebooting the system will be invalid

Methods for permanently modifying kernel parameters:

Modified:/etc/sysctl.conf

This file will not take effect immediately after modification and execution of SYSCTL-P will be effective immediately and permanently.

SYSCTL-A: Show All kernel parameters

Common Kernel Parameters:

/proc/sys/net/ipv4/ip_forward

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Module path:/lib/modules/

View modules loaded by the current system: Lsmod, Modinfo

Loading a module: Modprobe mod_name

Uninstalling a module: Modprobe-r mod_name

View module Details: modinfo mod_name This command to see the details of the module

Load module: Insmod/mod_path This command requires the input module path

Unload module: Remod mod_name

Features in the kernel, in addition to the core functions, at compile time, most of the functions have three choices:

1, do not use this function; 2, compile into kernel module; 3, compile into kernel

This article is from the "Burning Brain" blog, so be sure to keep this source http://rsddn.blog.51cto.com/10840178/1827914

modifying kernel parameters