Where is the Linux kernel config file?
The Linux kernel configuration is usually found in the kernel source in the file: /usr/src/linux/. config . It is not recommended to edit this file directly but to use one of these configuration options: make config – starts a character based questions and answer session.
How do I change the kernel configuration file?
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 Linux kernel configuration?
The Linux kernel is a C program compiled and installed by make . The make config command customizes the kernel configuration and generates the files (including the Makefile) needed to compile and link the kernel. On Linux systems, the kernel source directory is /usr/src/linux .
How do I find my kernel config file?
They provide kernel config files in their kernel packages and is usually found in /boot/ directory….Depending on your system, you’ll find it in any one of these:
- /proc/config. gz.
- /boot/config.
- /boot/config-$(uname -r)
How do I change kernel parameters in GRUB?
To change kernel parameters only during a single boot process, proceed as follows:
- Start the system and, on the GRUB 2 boot screen, move the cursor to the menu entry you want to edit, and press the e key for edit.
- Move the cursor down to find the kernel command line.
- Move the cursor to the end of the line.
How do I add kernel parameters in GRUB?
Start your system and wait for the GRUB menu to show (if you don’t see a GRUB menu, press and hold the left Shift key right after starting the system). Now highlight the kernel you want to use, and press the e key. You should be able to see and edit the commands associated with the highlighted kernel.
What is a Defconfig file?
defconfig. Generates a new kernel configuration with the default answer being used for all options. The default values are taken from a file located in the arch/$ARCH/defconfig file, where $ARCH refers to the specific architecture for which the kernel is being built.
What is config file in boot?
The configuration file (/boot/grub/grub. conf), which is used to create the list of operating systems to boot in GRUB’s menu interface, essentially allows the user to select a pre-set group of commands to execute.
Which command is used to configure kernel?
Linux kernel configuration
| Category | Requirements, Conventions or Software Version Used |
|---|---|
| System | Any Linux system |
| Software | Linux kernel source code |
| Other | Privileged access to your Linux system as root or via the sudo command. |
Where is Sysctl?
/proc/sys/
DESCRIPTION top. sysctl is used to modify kernel parameters at runtime. The parameters available are those listed under /proc/sys/.
What is insmod and modprobe?
insmod is similar to modprobe: it can insert a module into the Linux kernel. Unlike modprobe, however, insmod does not read its modules from a set location, automatically insert them, and manage any dependencies. insmod can insert a single module from any location, and does not consider dependencies when doing so.
How use insmod command in Linux?
insmod command in Linux systems is used to insert modules into the kernel….
- insmod + file name: This command is used to insert the LKM file (.
- insmod + file directory + file name: Like the previous command, insmod works when you specify the file directory along with the LKM file’s name.
How do I change the kernel boot parameters?
How to set temporary kernel boot parameters
- Reboot your system and hold the Shift key as its first booting up, and you will be brough into the GRUB boot menu.
- Highlight the kernel you want to edit (probably the first selection in the menu) and press e on your keyboard to temporarily edit the boot parameters.
How do you add a kernel parameter?
Permanently Add a Kernel Boot Parameter
- Log in to the system and start a terminal window (Applications->Accessories->Terminal).
- In the terminal window at the $ prompt, enter the command: sudo gedit /etc/default/grub.
Where can I find Defconfig?
Defconfig files are typically stored in the kernel tree at arch/*/configs/ . It may be desirable to modify the kernel configuration beyond what the hardware platform requires in order to support a particular hardware or software feature.
What is proc config GZ?
/proc/config. gz is a compressed copy of the kernel configuration that was used when the kernel was build. To modify kernel configuration you have to recompile the kernel.
What is PAE in Linux?
The Physical Address Extension (PAE) is a feature implemented in modern x86 processors. PAE extends memory addressing capabilities, allowing more than 4 GB of random access memory (RAM) to be used. NOTE: All the Linux machine with kernel version above 2.3.23 supports PAE kernel.
What is kernel-PAE in Linux?
What is Kernel-PAE in Linux? The Physical Address Extension (PAE) is a feature implemented in modern x86 processors. PAE extends memory addressing capabilities, allowing more than 4 GB of random access memory (RAM) to be used. NOTE: All the Linux machine with kernel version above 2.3.23 supports PAE kernel.
How do I install a PAE kernel on Ubuntu?
For 32-bit Ubuntu a PAE kernel is automatically downloaded and installed on a system with more than 3 GB of RAM. Otherwise, and if no network connection is available the generic kernel is used. Note that from Ubuntu and Kubuntu 12.04 LTS a PAE kernel only can be installed from the 32-bit installation CD.
What is the meaning of PAE in x86?
(PAE) stand for Physical Address Extension. It’s a feature of x86 and x86-64 processors that allows more than 4 Gigabytes of physical memory to be used in 32-bit systems. Reboot your machine.