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How to remove kernel source ?
chekkizhar
Posts: 182
in Fedora
hai,
In fedora, tried to recompile the kernel, but failed. After that During boot menu, the Fedora bootloader is showing the improper kernel too. If i choose, its taking me to login screen, but after that nothing, it just stopped.
I want to remove this, not from bootloader alone, the entire kernel that I compiled wrongly .
thank you
0
Comments
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linustorvalds wrote:hai,
In fedora, tried to recompile the kernel, but failed. After that During boot menu, the Fedora bootloader is showing the improper kernel too. If i choose, its taking me to login screen, but after that nothing, it just stopped.
I want to remove this, not from bootloader alone, the entire kernel that I compiled wrongly .
thank you
That depends on how you installed it.
Usually there's a file in the /boot directory which is the kernel.
Anyway, you do not need to uninstall it, just make sure there's a grub entry pointing to the right kernel (usually the one that comes with the distro is in /boot/vmlinuz)
Regards0 -
If you're absolutely sure that you know your BAD KERNEL VERSION (e.g., 2.6.36), then you can do this to remove it:
The first command removes the bad kernel's installed modules. The rest of the commands remove the bad kernel image and any initial ramdisk images, system maps, and kernel config files.- rm -rf /lib/modules/{BAD_KERNEL_VER}/
- rm -f /boot/vmlinuz-{BAD_KERNEL_VER}*
- rm -f /boot/initrd-{BAD_KERNEL_VER}*
- rm -f /boot/config-{BAD_KERNEL_VER}*
- rm -f /boot/System.map-{BAD_KERNEL_VER}*
You can always reinstall a Fedora-packaged kernel, too. First remove the entry from the RPM database:- rpm -e --justdb kernel (or kernel-PAE)
Then reinstall it w/yum, e,g:- yum install kernel (or kernel-PAE)
If you have multiple kernel packages installed, then you can do the above rpm/yum commands, but you have to pass the package version info with it, e.g.: kernel-2.6.36-1.fc10
List all installed kernels with:
Of course, don't do any of this unless you're feeling bold!- rpm -qa kernel (or kernel-PAE)
0 -
atreyu wrote:If you're absolutely sure that you know your BAD KERNEL VERSION (e.g., 2.6.36), then you can do this to remove it:
The first command removes the bad kernel's installed modules. The rest of the commands remove the bad kernel image and any initial ramdisk images, system maps, and kernel config files.- rm -rf /lib/modules/{BAD_KERNEL_VER}/
- rm -f /boot/vmlinuz-{BAD_KERNEL_VER}*
- rm -f /boot/initrd-{BAD_KERNEL_VER}*
- rm -f /boot/config-{BAD_KERNEL_VER}*
- rm -f /boot/System.map-{BAD_KERNEL_VER}*
You can always reinstall a Fedora-packaged kernel, too. First remove the entry from the RPM database:- rpm -e --justdb kernel (or kernel-PAE)
Then reinstall it w/yum, e,g:- yum install kernel (or kernel-PAE)
If you have multiple kernel packages installed, then you can do the above rpm/yum commands, but you have to pass the package version info with it, e.g.: kernel-2.6.36-1.fc10
List all installed kernels with:
Of course, don't do any of this unless you're feeling bold!- rpm -qa kernel (or kernel-PAE)
0 -
You also need to edit /boot/grub/grub.conf and remove the entry for the bad kernel.
I think what you have gone through is not uncommon for the first-time kernel builder. That happened to me also. Just remember to build/install the kernel like this:
1. make menuconfig, or make xconfig
2. make -jN, where N is the number of build threads to use - 1 per core or processor is good.
3. As root, make headers_install, make modules_install, make install - you can do all that (as root) with one command:
make headers_install modules_install install
If you just try make install, it won't do all the dependencies properly sometimes, so installing the headers and modules first makes sure all the drivers are in /lib/modules/KERNEL_VERSION before it actually tries to install the kernel into /boot.0
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