What is kernel configuration in Linux?
Kernel Options. There is a wide range of kernel configuration items that can be selected prior to the build phase. The build system is controlled by the contents of a . config file in the root directory of the kernel tree. The configuration file itself can be generated by issuing the make menuconfig command.
How do I change the kernel configuration file?
The clean and simple way is:
- make <device>_defconfig.
- make menuconfig. edit. exit saving changes.
- make savedefconfig. creates a file named defconfig.
- cp defconfig arch/$ARCH/configs/<device>_defconfig. where $ARCH is the CPU architecture, e.g. arm.
Where is the kernel config file located?
You can look at /proc/config. gz if you’re in luck, it will be there. If you have the kernel source, it’s worth having a look at /arch/arm/configs – most Android kernel’s I’ve seen will have the default config for your CPU and you can start from there.
How do I access kernel config?
To configure the kernel, change to /usr/src/linux and enter the command make config. Choose the features you want supported by the kernel. Usually, There are two or three options: y, n, or m. m means that this device will not be compiled directly into the kernel, but loaded as a module.
What is the main way to reduce the size of the kernel?
1. Deleted all the printk messages from displaying which reduced some memory, 2. Turning off Sysfs Support decreased the size of the kernel substantially, 3. Booting without procfs is one more work around i tried, but many pseudo file systems require it.
What is the difference between Android kernel and Linux kernel?
It is based on the modified version of the Linux kernel and other open source software. It is specifically designed for touchscreen mobile devices like smartphones and tablets. It was developed using C, Java, C++ and other languages.
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Difference between Linux and Android.
| LINUX | ANDROID |
|---|---|
| Kernel used in Linux is Monolithic. | Its Kernel type is Linux-based. |
How do I change Linux kernel?
10. Making Changes to Kernel Code
- Make the changes in the required file, re-check it.
- make SUBDIRS=”path” – to compile the particular module.
- make modules_install – to install the module, you can manually copy the module to the /lib/ directory.
- make install – update the whole system if required, not required generally.
What is a kernel config file?
config . This file is used during the compilation of the kernel and is not erased unless you erase it manually or run make mrproper . It’s common to keep kernel source trees in /usr/src ; if you did the compilation in /usr/src/linux-3.0. 7 then your . config file is in /usr/src/linux-3.0.
Where kernel is located in Linux?
Where Are the Linux Kernel Files? The kernel file, in Ubuntu, is stored in your /boot folder and is called vmlinuz-version.